Apache HTTP Server (httpd) Vulnerabilities & Security Advisories
47 advisories tracked · ASF Security ([email protected] CNA) via NVD · 1 listed in the CISA Known Exploited Vulnerabilities catalog
Every row below is a published Apache Software Foundation advisory that VulniPulse classified as HTTP Server (httpd), with the CVEs, affected and fixed releases and exploitation status the vendor stated. Severity mix: 3 critical, 18 high, 16 medium, 3 low.
Source
ASF Security ([email protected] CNA) via NVD
The Apache Software Foundation is its own CVE Numbering Authority: every Apache project CVE (HTTP Server, Tomcat, ActiveMQ, Struts, Kafka, Airflow, OFBiz, Solr and 300+ more) is published by [email protected] and announced on the projects' mailing lists. VulniPulse ingests the CNA feed from NVD filtered to [email protected] — official, machine-readable, with affected/fixed versions embedded in each description. Per-project security pages (httpd.apache.org/security, tomcat.apache.org/security-XX.html) carry the vendor detail.
Latest Apache HTTP Server (httpd) advisories
Medium [CVE-2026-86531] The embedded OpenEJB HTTP server does not limit the size of incoming request bodies or of multipart requests, and does not remove the temporary files it creates for multipart parts
The embedded OpenEJB HTTP server does not limit the size of incoming request bodies or of multipart requests, and does not remove the temporary files it creates for multipart parts. A remote unauthenticated attacker can cause excessive memory or disk usage, leading to denial of service. Deployments using the Tomcat connectors are not affected. Users are recommended to block network access to the embedded HTTP server from untrusted clients, or to migrate to the Tomcat based TomEE distributions. Affected product named by the advisory: Apache TomEE.
Medium [CVE-2026-97870] When Hessian remoting endpoints are served by the embedded HTTP server, configured authentication and transport security requirements are silently ignored
When Hessian remoting endpoints are served by the embedded HTTP server, configured authentication and transport security requirements are silently ignored. A remote unauthenticated attacker can invoke the exposed EJB methods without credentials or over an unencrypted connection. Only deployments that use the embedded HTTP server rather than Tomcat and rely on these settings are affected. Users are recommended to block network access to Hessian endpoints from untrusted clients, or to migrate to another remoting protocol. Affected product named by the advisory: Apache TomEE.
Medium [CVE-2026-97880] The embedded OpenEJB HTTP server dispatches some requests to REST endpoints configured for HTTP Basic authentication without verifying credentials
The embedded OpenEJB HTTP server dispatches some requests to REST endpoints configured for HTTP Basic authentication without verifying credentials. A remote unauthenticated attacker can invoke protected resources, bypassing authentication. Only deployments that use the embedded HTTP server with Basic authentication are affected. Users are recommended to block network access to the embedded HTTP server from untrusted clients, or to migrate to the Tomcat based TomEE distributions. Affected product named by the advisory: Apache TomEE.
Medium [CVE-2026-97881] The embedded OpenEJB HTTP server does not restrict static resource paths to the configured resource directories
The embedded OpenEJB HTTP server does not restrict static resource paths to the configured resource directories. A remote unauthenticated attacker can read arbitrary files accessible to the server process. Users are recommended to block network access to the embedded HTTP server from untrusted clients, or to migrate to the Tomcat based TomEE distributions. Affected product named by the advisory: Apache TomEE.
Medium [CVE-2026-97888] The embedded HTTP server does not clear the security identity established during a request before its worker thread handles the next request
The embedded HTTP server does not clear the security identity established during a request before its worker thread handles the next request. A remote unauthenticated attacker can have their request processed with the identity of a previously authenticated user, gaining that user's privileges. Only applications served by the embedded HTTP server that authenticate programmatically or via basic authentication are affected. Users are recommended to block network access to the embedded HTTP server from untrusted clients, or to migrate to the Tomcat based TomEE distributions. Affected product named by the advisory: Apache TomEE.
Medium [CVE-2026-111245] After a successful WS-Security UsernameToken authentication, the caller identity stays associated with the worker thread once the request completes when web services are served by the standalone OpenEJB HTTP server
After a successful WS-Security UsernameToken authentication, the caller identity stays associated with the worker thread once the request completes when web services are served by the standalone OpenEJB HTTP server. A remote unauthenticated attacker whose request is later processed on the same thread can invoke protected EJB methods with the identity of a previously authenticated user. Users are recommended to upgrade to version 10.3.0 or 11.0.0-M2, which fix the issue. Affected product named by the advisory: Apache TomEE.
Medium [CVE-2026-111250] The embedded OpenEJB HTTP server reports every request as authenticated when an application requests authentication programmatically
The embedded OpenEJB HTTP server reports every request as authenticated when an application requests authentication programmatically. A remote unauthenticated attacker can access functionality protected this way. Only applications served by the embedded HTTP server that rely on programmatic authentication are affected. Users are recommended to block network access to the embedded HTTP server from untrusted clients, or to migrate to the Tomcat based TomEE distributions. Affected product named by the advisory: Apache TomEE.
Medium [CVE-2026-111256] When JAX-WS or JAX-RS endpoints are published by the embedded OpenEJB HTTP server rather than Tomcat, some configured authentication methods are silently ignored and the endpoint is published without authentication
When JAX-WS or JAX-RS endpoints are published by the embedded OpenEJB HTTP server rather than Tomcat, some configured authentication methods are silently ignored and the endpoint is published without authentication. A remote unauthenticated attacker can invoke the exposed operations without credentials. Only deployments that use the embedded HTTP server and rely on such an authentication method are affected. Users are recommended to block network access to the embedded HTTP server from untrusted clients, or to migrate to the Tomcat based TomEE distributions. Affected product named by the advisory: Apache TomEE.
Low [CVE-2026-97890] The embedded HTTP server does not invalidate the previous session identifier when an application changes the session id, e.g
The embedded HTTP server does not invalidate the previous session identifier when an application changes the session id, e.g. after login. An attacker who can plant a session identifier in a victim's browser can hijack the victim's authenticated session. Users are recommended to block network access to the embedded HTTP server from untrusted clients, or to migrate to the Tomcat based TomEE distributions. Affected product named by the advisory: Apache TomEE.
Low [CVE-2026-111246] The embedded OpenEJB HTTP server does not isolate HTTP sessions between web applications
The embedded OpenEJB HTTP server does not isolate HTTP sessions between web applications. A remote attacker can use a session established in one web application in another one, which then trusts session state set by the first application. Only deployments hosting several web applications on the embedded HTTP server are affected. Users are recommended to block network access to the embedded HTTP server from untrusted clients, or to migrate to the Tomcat based TomEE distributions. Affected product named by the advisory: Apache TomEE.
Critical [CVE-2026-59797] Improper Privilege Management vulnerability in Apache HTTP Server's mod_ssl via SSLRequire and file-related expressions
Improper Privilege Management vulnerability in Apache HTTP Server's mod_ssl via SSLRequire and file-related expressions. This issue affects Apache HTTP Server: from 2.4.0 through 2.4.68.
Critical [CVE-2026-57941] Use After Free vulnerability in Apache HTTP Server's mod_http2 via shared session->bbtmp re-entrancy This issue affects Apache HTTP Server: from 2.4.0 through 2.4.68
Use After Free vulnerability in Apache HTTP Server's mod_http2 via shared session->bbtmp re-entrancy This issue affects Apache HTTP Server: from 2.4.0 through 2.4.68.
Critical [CVE-2026-56154] Use After Free vulnerability in Apache HTTP Server's mod_rewrite when using lookahead (%{LA-U:HTTP:...}) This issue affects Apache HTTP Server: from 2.4.0 through 2.4.68
Use After Free vulnerability in Apache HTTP Server's mod_rewrite when using lookahead (%{LA-U:HTTP:...}) This issue affects Apache HTTP Server: from 2.4.0 through 2.4.68.
High [CVE-2026-63686] NULL pointer dereference in mod_xml2enc in Apache Software Foundation Apache HTTP Server before 2.4.69 on all platforms allows an untrusted backend server to cause a denial of service via a proxied response with a charset whose conversion partially succeeds then fails
A NULL pointer dereference in mod_xml2enc in Apache Software Foundation Apache HTTP Server before 2.4.69 on all platforms allows an untrusted backend server to cause a denial of service via a proxied response with a charset whose conversion partially succeeds then fails. Users are recommended to upgrade to version 2.4.69, which fixes this issue.
High [CVE-2026-93546] Integer overflow in mod_dav_fs in Apache HTTP Server through 2.4.68 allows an authenticated WebDAV client with write access to crash worker processes and persistently corrupt a directory's property database via PROPPATCH requests declaring many XML namespaces
Integer overflow in mod_dav_fs in Apache HTTP Server through 2.4.68 allows an authenticated WebDAV client with write access to crash worker processes and persistently corrupt a directory's property database via PROPPATCH requests declaring many XML namespaces.
High [CVE-2026-73637] Use after free in mod_auth_digest in Apache Software Foundation Apache HTTP Server before 2.4.69 on all platforms allows an unauthenticated remote client to cause authentication state corruption via concurrent Digest authentication requests when AuthDigestNcCheck is enabled or AuthDigestNonceLifetime is set to 0
Use after free in mod_auth_digest in Apache Software Foundation Apache HTTP Server before 2.4.69 on all platforms allows an unauthenticated remote client to cause authentication state corruption via concurrent Digest authentication requests when AuthDigestNcCheck is enabled or AuthDigestNonceLifetime is set to 0. Users are recommended to upgrade to version 2.4.69, which fixes this issue.
High [CVE-2026-73636] Authentication bypass by capture-replay in mod_auth_digest in Apache Software Foundation Apache HTTP Server 2.4.x on all platforms allows a man-in-the-middle (MITM) attacker to replay captured digest authentication credentials via crafted requests that trigger garbage collection of the client's shared memory entry when AuthDigestNonceLifetime is set to 0
Authentication bypass by capture-replay in mod_auth_digest in Apache Software Foundation Apache HTTP Server 2.4.x on all platforms allows a man-in-the-middle (MITM) attacker to replay captured digest authentication credentials via crafted requests that trigger garbage collection of the client's shared memory entry when AuthDigestNonceLifetime is set to 0. Users are recommended to upgrade to version 2.4.69, which fixes this issue.
High [CVE-2026-63718] Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') response smuggling vulnerability in Apache HTTP Server via mod_proxy_uwsgi and a crafted uwsgi response with Transfer-Encoding
Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') response smuggling vulnerability in Apache HTTP Server via mod_proxy_uwsgi and a crafted uwsgi response with Transfer-Encoding. This issue affects Apache HTTP Server: from 2.4.30 through 2.4.68.
High [CVE-2026-63292] Stack-based buffer overflow in mod_vhost_alias in Apache Software Foundation Apache HTTP Server through 2.4.68 on all platforms allows a remote client to cause a denial of service or potentially execute arbitrary code via an HTTP request with a Host header exceeding 8192 bytes when VirtualDocumentRoot uses a hostname format specifier and LimitRequestFieldSize is raised above the default
Stack-based buffer overflow in mod_vhost_alias in Apache Software Foundation Apache HTTP Server through 2.4.68 on all platforms allows a remote client to cause a denial of service or potentially execute arbitrary code via an HTTP request with a Host header exceeding 8192 bytes when VirtualDocumentRoot uses a hostname format specifier and LimitRequestFieldSize is raised above the default. Users are recommended to upgrade to version 2.4.69, which fixes this issue.
High [CVE-2026-63045] Improper validation of FTP PASV reply address in mod_proxy_ftp in Apache Software Foundation Apache HTTP Server through 2.4.68 on all platforms allows, in forward proxy configurations, an untrusted FTP server to cause the proxy to open a data connection to an arbitrary third-party host via a crafted PASV response
Improper validation of FTP PASV reply address in mod_proxy_ftp in Apache Software Foundation Apache HTTP Server through 2.4.68 on all platforms allows, in forward proxy configurations, an untrusted FTP server to cause the proxy to open a data connection to an arbitrary third-party host via a crafted PASV response. Users are recommended to upgrade to version 2.4.69, which fixes this issue.
High [CVE-2026-59685] Out-of-bounds Write vulnerability in Apache HTTP Server on Windows while processing paths with 8.3 names that may grow when expanded
Out-of-bounds Write vulnerability in Apache HTTP Server on Windows while processing paths with 8.3 names that may grow when expanded. This issue affects Apache HTTP Server: from 2.4.0 through 2.4.68.
High [CVE-2026-56449] Apache HTTP Server: mod_proxy_html: crash in dump_content
Out-of-bounds Write vulnerability in Apache HTTP Server's mod_proxy_html with crafted HTTP response bodies. This issue affects Apache HTTP Server version 2.4.68.
High [CVE-2026-56153] Out-of-bounds Write vulnerability in Apache HTTP Server's mod_charset_lite
Out-of-bounds Write vulnerability in Apache HTTP Server's mod_charset_lite. This issue affects Apache HTTP Server: from 2.4.0 through 2.4.68.
High [CVE-2026-48005] Missing authentication checks in mod_auth_digest in Apache Software Foundation Apache HTTP Server before 2.4.69 on all platforms allows an unauthenticated remote client to cause a denial of service (forced re-authentication) via forged Authorization headers when Digest authentication is enabled with AuthDigestNcCheck
Missing authentication checks in mod_auth_digest in Apache Software Foundation Apache HTTP Server before 2.4.69 on all platforms allows an unauthenticated remote client to cause a denial of service (forced re-authentication) via forged Authorization headers when Digest authentication is enabled with AuthDigestNcCheck. Users are recommended to upgrade to version 2.4.69, which fixes this issue.
High [CVE-2026-47360] Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Apache HTTP Server's mod_session_cookie module
Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Apache HTTP Server's mod_session_cookie module. When SessionCookieRemove changes across internal redirects, the session cookie may still be passed to a backend server. This issue affects Apache HTTP Server: from 2.4.0 through 2.4.68.
High [CVE-2026-46729] NULL Pointer Dereference vulnerability in Apache HTTP Servers mod_heartmonitor over unicast listener
NULL Pointer Dereference vulnerability in Apache HTTP Servers mod_heartmonitor over unicast listener. This issue affects Apache HTTP Server: from 2.4.0 through 2.4.68.
Medium [CVE-2026-79768] Path equivalence: '/./' (single dot directory) vulnerability in Apache HTTP Server's mod_userdir module when configured with absolute non-wildcard UserDir directive (the 2nd form in https://httpd.apache.org/docs/2.4/mod/mod_userdir.html#userdir) This issue affects Apache HTTP Server: from 2.4.0 through 2.4.68
Path equivalence: '/./' (single dot directory) vulnerability in Apache HTTP Server's mod_userdir module when configured with absolute non-wildcard UserDir directive (the 2nd form in ) This issue affects Apache HTTP Server: from 2.4.0 through 2.4.68.
Medium [CVE-2026-58415] Internal state files accessible to external parties in mod_dav_fs in Apache Software Foundation Apache HTTP Server before 2.4.69 on all platforms allows a remote client to read WebDAV dead properties of resources it cannot author via a GET request for the.DAV state directory This issue affects Apache HTTP Server: from 2.4.0 through 2.4.68
Internal state files accessible to external parties in mod_dav_fs in Apache Software Foundation Apache HTTP Server before 2.4.69 on all platforms allows a remote client to read WebDAV dead properties of resources it cannot author via a GET request for the.DAV state directory This issue affects Apache HTTP Server: from 2.4.0 through 2.4.68.
Medium [CVE-2026-42528] memory calculation bug in mod_dav in Apache httpd 2.4.67 and earlier allows an attacker with permission to create WebDAV locks to crash server child processes
A memory calculation bug in mod_dav in Apache httpd 2.4.67 and earlier allows an attacker with permission to create WebDAV locks to crash server child processes. Users are recommended to upgrade to version 2.4.69, which fixes this issue Affected product named by the advisory: Apache HTTP Server.
Low [CVE-2026-42356] Deployment of wrong handler vulnerability in Apache HTTP Server allows the target of some internal redirects from CGI programs to also be treated as CGI and executed
Deployment of wrong handler vulnerability in Apache HTTP Server allows the target of some internal redirects from CGI programs to also be treated as CGI and executed. The target must already be in a directory enabled for CGI and have no other extension understood by mod_mime. This issue affects Apache HTTP Server: from 2.4.60 through 2.4.68.
Advisory [CVE-2026-49975] Apache HTTP Server: mod_http2 denial of service
Memory Allocation with Excessive Size Value vulnerability in Apache HTTP Server's mod_http leads to denial of service via malicious HTTP requests. This issue affects Apache HTTP Server: from 2.4.17 through 2.4.67.
Advisory [CVE-2026-42536] Apache HTTP Server: mod_xml2enc heap overflow
Heap-based Buffer Overflow vulnerability in Apache HTTP Server with mod_xml2enc, xml2StartParse, and untrusted content This issue affects Apache HTTP Server: from 2.4.0 through 2.4.67. Users are recommended to upgrade to version 2.4.68, which fixes the issue.
Advisory [CVE-2026-44185] Apache HTTP Server: Stack Buffer Over-Read in mod_ssl OCSP `send_request`
Buffer Over-read vulnerability in Apache HTTP Server via outbound OCSP requests to an attacker controlled OCSP server This issue affects Apache HTTP Server: from 2.4.0 through 2.4.67. Users are recommended to upgrade to version 2.4.68, which fixes the issue.
Advisory [CVE-2026-34355] Apache HTTP Server: mod_proxy_html buffer overflow
A buffer overflow in mod_proxy_html in Apache HTTP Server 2.4.67 and earlier allows an attack by an untrusted backend. Users are recommended to upgrade to version 2.4.68, which fixes this issue.
Advisory [CVE-2026-28780] Apache HTTP Server: buffer overflow in mod_proxy_ajp via ajp_msg_check_header
Heap-based Buffer Overflow vulnerability in mod_proxy_ajp of Apache HTTP Server. If mod_proxy_ajp connects to a malicious AJP server this AJP server can send a malicious AJP message back to mod_proxy_ajp and cause it to write 4 attacker controlled bytes after the end of a heap based buffer. This issue affects Apache HTTP Server: through 2.4.66. Users are recommended to upgrade to version 2.4.67, which fixes the issue.
High [CVE-2026-29169] NULL pointer dereference in mod_dav_lock in Apache HTTP Server 2.4.66 and earlier may
A NULL pointer dereference in mod_dav_lock in Apache HTTP Server 2.4.66 and earlier may allow an attacker to crash the server with a malicious request.mod_dav_lock is not used internally by mod_dav or mod_dav_fs. The only known use-case for mod_dav_lock was mod_dav_svn from Apache Subversion earlier than version 1.2.0. Users are recommended to upgrade to version 2.4.66, which fixes this issue, or remove mod_dav_lock.
High [CVE-2026-23918] Apache HTTP Server: http2: double free and possible RCE on early reset
Double Free and possible RCE vulnerability in Apache HTTP Server with the HTTP/2 protocol. This issue affects Apache HTTP Server: 2.4.66. Users are recommended to upgrade to version 2.4.67, which fixes the issue.
High [CVE-2026-34059] Apache HTTP Server: Buffer Over-read vulnerability in Apache HTTP Server.
Buffer Over-read vulnerability in Apache HTTP Server. This issue affects Apache HTTP Server: through 2.4.66. Users are recommended to upgrade to version 2.4.67, which fixes the issue.
High [CVE-2026-24072] escalation of privilege bug in various modules in Apache HTTP 2.4.66 and earlier
An escalation of privilege bug in various modules in Apache HTTP 2.4.66 and earlier allows local.htaccess authors to read files with the privileges of the httpd user. Users are recommended to upgrade to version 2.4.67, which fixes this issue.
Medium [CVE-2026-33523] HTTP response splitting vulnerability in multiple Apache HTTP Server modules with untrusted or compromised backend servers
HTTP response splitting vulnerability in multiple Apache HTTP Server modules with untrusted or compromised backend servers. This issue affects Apache HTTP Server: from through 2.4.66. Users are recommended to upgrade to version 2.4.67, which fixes the issue.
Medium [CVE-2026-33007] NULL pointer dereference in the mod_authn_socache in Apache HTTP Server 2.4.66 and earlier
A NULL pointer dereference in the mod_authn_socache in Apache HTTP Server 2.4.66 and earlier allows an unauthenticated remote user to crash a child process in a caching forward proxy configuration. Users are recommended to upgrade to version 2.4.67, which fixes this issue.
Medium [CVE-2026-33006] timing attack against mod_auth_digest in Apache HTTP Server 2.4.66 allows a bypass of Digest authentication by a remote attacker
A timing attack against mod_auth_digest in Apache HTTP Server 2.4.66 allows a bypass of Digest authentication by a remote attacker. Users are recommended to upgrade to version 2.4.67, which fixes this issue.
Medium [CVE-2026-34032] Apache HTTP Server: Improper Null Termination, Out-of-bounds Read vulnerability in Apache HTTP Server.
Improper Null Termination, Out-of-bounds Read vulnerability in Apache HTTP Server. This issue affects Apache HTTP Server: through 2.4.66. Users are recommended to upgrade to version 2.4.67, which fixes the issue.
Medium [CVE-2026-33857] Apache HTTP Server: Out-of-bounds Read vulnerability in mod_proxy_ajp of Apache HTTP Server.
Out-of-bounds Read vulnerability in mod_proxy_ajp of Apache HTTP Server. Users are recommended to upgrade to version 2.4.67, which fixes the issue.
High [CVE-2026-40022] Apache Camel Platform HTTP Main: Authentication Bypass on Non-Root Context Paths in camel main runtime
When authentication is enabled on the Apache Camel embedded HTTP server or embedded management server (camel-platform-http-main) and a non-root context path such as /api or /admin is configured via camel.server.path or camel.management.path, the BasicAuthenticationConfigurer and JWTAuthenticationConfigurer classes derive the authentication path from properties.getPath() when camel.server.authenticationPath / camel.management.authenticationPath is not explicitly set. Combined with the Vert.x sub-router mounting model - the sub-router is mounted at _path_* and the authentication handler is registered inside the sub-router at the resolved path - this causes the authentication handler to match only the exact configured context path, not its subpaths. Unauthenticated requests to subpaths such as /api/_route_ or /admin/observe/info therefore reach protected business routes and management endpoints without being challenged for credentials. The /observe/info endpoint can disclose runtime metadata such as the user, working directory, home directory, process ID, JVM and operating system information. This issue affects Apache Camel: from 4.14.1 before 4.14.6, from 4.18.0 before 4.18.2. Users are recommended to upgrade to version 4.20.0, which fixes the issue. If users are on the 4.14.x LTS releases stream, they are suggested to upgrade to 4.14.6.
Advisory [CVE-2024-38472] Apache HTTP Server on WIndows UNC SSRF
SSRF in Apache HTTP Server on Windows allows to potentially leak NTLM hashes to a malicious server via SSRF and malicious requests or content Users are recommended to upgrade to version 2.4.60 which fixes this issue. Note: Existing configurations that access UNC paths will have to configure new directive "UNCList" to allow access during request processing.
Advisory [CVE-2021-40438] mod_proxy SSRF
A crafted request uri-path can cause mod_proxy to forward the request to an origin server choosen by the remote user. This issue affects Apache HTTP Server 2.4.48 and earlier.
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