Red Hat Linux Security Advisories & CVEs
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Security advisories for your Red Hat release
Pick your distribution release to see every advisory issued for it and its severity mix. Fixes ship as errata — keep the system patched. This is the release's advisory history, not a per-package scan.
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Red Hat Enterprise Linux errata (RHSA) via the official Red Hat Security Data API — CVE severity, CVSS and affected packages. A credential-free official source.
Latest Red Hat advisories
Medium [CVE-2026-70367] SSRF bypass in stunnel SOCKS proxy via IPv4-mapped IPv6 loopback and unspecified addresses allows access to loopback-only services
SSRF bypass in stunnel SOCKS proxy via IPv4-mapped IPv6 loopback and unspecified addresses allows access to loopback-only services. Red Hat rates this moderate (CVSS 5.4). Weakness: CWE-918. Affected products named by the advisory: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9.
Medium [CVE-2026-17614] Path Traversal on WildFly Domain Controller
A path traversal flaw was found in WildFly's domain mode implementation. The LocalFileRepository.getFile() and getConfigurationFile() methods in wildfly-core/deployment-repository do not validate that the resolved file path remains within the configured repository or configuration root directories. A remote attacker who has obtained the slave host controller secret or compromised a slave host controller can supply a crafted relative path containing directory traversal sequences (e.g.,../../etc/passwd) via the slave-DC wire protocol, causing the Domain Controller to resolve and serve arbitrary files readable by the DC process. This leads to unauthorized disclosure of sensitive information such as configuration files, keystores, and system credentials. This Important vulnerability in WildFly domain mode allows an authenticated attacker, who has obtained the slave-secret credential, to perform arbitrary file reading on the Domain Controller's filesystem. This flaw bypasses intended access controls for file retrieval, potentially leading to sensitive information disclosure from the compromised host. Red Hat severity: Moderate — CVSS 4.4 (CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N). Weakness: CWE-22.
Medium [CVE-2026-58044] Request smuggling via HTTP client header truncation
Request smuggling via HTTP client header truncation. Red Hat rates this moderate (CVSS 4.8). Weakness: CWE-444. Red Hat lists fixing advisory RHSA-2026:52990 with package nodejs22-main-22.23.2-2.3.hum1, nodejs24-main-24.18.1-0.1.hum1, nodejs26-main-26.7.0-1.5.1.hum1.
Medium [CVE-2026-58042] Denial of Service via DNS responses with excessive A records
Denial of Service via DNS responses with excessive A records. Red Hat rates this moderate (CVSS 5.9). Weakness: CWE-400. Red Hat lists fixing advisory RHSA-2026:52990 with package nodejs22-main-22.23.2-2.3.hum1, nodejs24-main-24.18.1-0.1.hum1, nodejs26-main-26.7.0-1.5.1.hum1.
Medium [CVE-2026-58045] Denial of Service vulnerability
Denial of Service vulnerability. Red Hat rates this moderate (CVSS 6.2). Weakness: CWE-617. Red Hat lists fixing advisory RHSA-2026:52990 with package nodejs22-main-22.23.2-2.3.hum1, nodejs24-main-24.18.1-0.1.hum1, nodejs26-main-26.7.0-1.5.1.hum1.
Medium [CVE-2026-58041] Node.js node:sqlite: Unintended data modification due to stale statement iterator
Node.js node:sqlite: Unintended data modification due to stale statement iterator. Red Hat rates this moderate (CVSS 5.3). Weakness: CWE-367. Red Hat lists fixing advisory RHSA-2026:52990 with package nodejs22-main-22.23.2-2.3.hum1, nodejs24-main-24.18.1-0.1.hum1, nodejs26-main-26.7.0-1.5.1.hum1.
Medium [CVE-2026-51400] Arbitrary code execution via vms_fixfilename function
Arbitrary code execution via vms_fixfilename() function. Red Hat rates this moderate (CVSS 5.5). Weakness: CWE-94.
Medium [CVE-2026-69198] Server-Side Request Forgery (SSRF) and trust-boundary bypass
Server-Side Request Forgery (SSRF) and trust-boundary bypass. Red Hat rates this moderate (CVSS 5.3). Weakness: CWE-1389. Red Hat lists fixing advisory RHSA-2026:50826 with package grafana13-1-main-13.1.1-0.5.2.hum1, grafana12-4-main-12.4.6-0.3.hum1.
Medium [CVE-2026-69153] Information disclosure via crafted sourceMappingURL
PostCSS takes a CSS file and provides an API to analyze and modify its rules by transforming the rules into an Abstract Syntax Tree. Prior to 8.5.19, if from is unset, an attacker can cause PreviousMap.loadFile() to read an unintended source-map file by supplying an absolute or directory-traversal sourceMappingURL. The resulting map’s sources and sourcesContent may then be exposed to the application. This issue is fixed in version 8.5.19. A flaw was found in PostCSS. A remote attacker can exploit this vulnerability by providing a specially crafted sourceMappingURL when a specific configuration (the 'from' parameter) is not set. This can cause the application to read and expose unintended source-map files, potentially revealing sensitive information about the application's source code. Red Hat rates this flaw as Moderate because the information disclosed is limited to files with a.map extension. Source map files may contain source code paths and content, but the attacker cannot read arbitrary files on the system. Exploitation requires the application to process attacker-controlled CSS through PostCSS on the server side. Red Hat severity: Moderate — CVSS 5.3 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N). Weakness: CWE-22.
Medium [CVE-2026-18477] TOCTOU in incremental dumpdir 'X' rename handling allows restore path escape
A TOCTOU (Time-of-Check Time-of-Use) vulnerability in GNU tar's incremental dumpdir 'X' rename handling allows a local attacker with write access to a directory being backed up to influence the restore process if the attacker has access to the system where the restore is being performed. During restoration, files or directories may be created, renamed or overwritten outside the intended extraction directory. This could lead to unauthorized file modification or, in some cases, privilege escalation. Exploitation does not require the attacker to modify or craft the archive, and standard backup and restore workflows—including extracting into a newly created directory without using the -P option do not mitigate the issue. This issue affects GNU tar incremental backup and restore (-g/-G). A local attacker who can write to content included in an incremental backup, and who can also access the system where that backup is later restored, may cause the restore to create, rename, or overwrite paths outside the intended extraction directory via a TOCTOU race in dumpdir 'X' handling. Red Hat is assessing impact for the tar package in supported products. Red Hat severity: Moderate — CVSS 4.4 (CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:N). Weakness: CWE-367.
Medium [CVE-2026-18651] SASL PLAIN bind installs connection credentials before account-lock check, allowing continued access as a locked account
A flaw was found in 389 Directory Server. During SASL PLAIN authentication, the server installs connection-level bind credentials before performing the account-lock check. If the account is subsequently found to be locked, the bind is reported as failed to the client, but the already-installed authenticated state on the connection is not reverted. A client that supplies valid credentials for an account that has been administratively locked can continue to use the same connection with that account's privileges, defeating account lock as an access-revocation control. This flaw lets a user authenticate to an already-locked account (nsAccountLock: true) via SASL PLAIN, using that account's own correct password. The server checks the password before it checks the lock, so the connection becomes authenticated even though the client is told the bind failed. After bind, the user can read and modify what that account was already permitted to touch - no escalation and access beyond it's own rights. Red Hat severity: Moderate — CVSS 5.4 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N). Weakness: CWE-287. Affected Red Hat products: Red Hat Directory Server 11; Red Hat Directory Server 12; Red Hat Directory Server 13; Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9. Red Hat lists Red Hat Enterprise Linux 6 as not affected.
Medium [CVE-2026-18508] --one-top-level hardlink targets not confined to top-level directory enabling arbitrary file overwrite
A flaw was found in GNU tar. When extracting an archive with the --one-top-level option, hardlink targets are not confined to the designated top-level directory and may resolve relative to the extraction working directory. A crafted archive can create hardlinks that escape the intended boundary and, when combined with a preexisting symbolic link under the working directory, may allow writing outside that boundary during a single extraction. Red Hat Enterprise Linux is affected. This issue only applies when the --one-top-level option is used to extract an untrusted archive. Default tar extraction without --one-top-level is not impacted by this specific boundary failure. Users should avoid using --one-top-level as the sole confinement mechanism for untrusted archives until fixed packages are available. Red Hat severity: Moderate — CVSS 4.4 (CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N). Weakness: CWE-59. Red Hat lists Red Hat Hardened Images as not affected. Red Hat fixing advisory: RHSA-2026:61586, RHSA-2026:70390, RHSA-2026:61581, RHSA-2026:61783, RHSA-2026:50807, RHSA-2026:66018. Affected products named by the advisory: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat Discovery 2; and 5 more.
Medium [CVE-2026-68742] NSS responder out-of-bounds read via unchecked addrlen in GETHOSTBYADDR
A flaw was found in SSSD. The sss_nss_protocol_parse_addr() function in the NSS responder does not validate the addrlen field against the remaining packet body size. A local attacker can exploit this via a crafted GETHOSTBYADDR request to the NSS responder socket, causing an out-of-bounds read and process crash, resulting in a denial of service. This issue can only be triggered by a local attacker who can connect to the SSSD NSS responder unix socket and send crafted requests. The over-read bytes are used as a lookup key and are not returned to the client, so the impact is limited to denial of service. The sssd monitor may respawn the responder, but repeated crashes can lead to a persistent name-resolution outage for SSSD-managed users. Red Hat severity: Moderate — CVSS 5.5 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H). Weakness: CWE-125. Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat OpenShift Container Platform 4. Red Hat lists Red Hat Enterprise Linux 6 as not affected. Red Hat does not currently list a fixing RHSA for this CVE. Affected products named by the advisory: Red Hat package: sssd.
Medium [CVE-2026-68743] PAM responder out-of-bounds read via unchecked auth_token_length in protocol v1
A flaw was found in SSSD. The extract_authtok_v1() function in the PAM responder does not validate the auth_token_length field against the remaining buffer size before processing. A local attacker can exploit this via a crafted protocol v1 request to the PAM responder socket, causing an out-of-bounds read and process crash, resulting in a denial of service. This issue can only be triggered by a local attacker who can connect to the SSSD PAM responder unix socket and send crafted protocol v1 requests. The stock PAM client uses protocol v3 and is not affected by this path. On SSSD 2.10 and later, responders run as an unprivileged user; on earlier versions they may run as root. In either case, the impact is a denial of service of SSSD-mediated authentication. The sssd monitor may respawn the responder, but repeated crashes can lead to a persistent authentication outage for SSSD-managed users. This issue is distinct from CVE-2026-6245, which affects a different code path (pam_passkey_child_read_data). Red Hat severity: Moderate — CVSS 5.5 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H). Weakness: CWE-125. Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat OpenShift Container Platform 4. Will not fix / out of support: Red Hat Enterprise Linux 6.
Medium [CVE-2026-12259] Installation of attacker-controlled packages due to improper checksum validation
Installation of attacker-controlled packages due to improper checksum validation. Red Hat rates this moderate (CVSS 5.3). Weakness: CWE-354. Affected products named by the advisory: Exploit Intelligence; Lightspeed Core; OpenShift Lightspeed; Red Hat Ansible Automation Platform 2; and 1 more. Affected products named by the advisory: Red Hat OpenShift AI (RHOAI).
Medium [CVE-2026-6695] remote code execution via crafted paa file
A flaw was found in GIMP. A remote attacker could exploit this by tricking a user into opening a specially crafted PAA (Paint Shop Pro Array) image file. This vulnerability, a heap-based out-of-bounds write in the decode_lzss() function of the PAA file format plugin, allows data to be written beyond the intended memory buffer. This could lead to heap metadata corruption and potentially enable the attacker to execute arbitrary code on the affected system. Red Hat Enterprise Linux systems where GIMP is installed and used to process untrusted image files are affected. Red Hat severity: Moderate — CVSS 5.5 (CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H). Weakness: CWE-805. Red Hat does not currently list a fixing RHSA for this CVE. Affected products named by the advisory: Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; and 1 more. Affected products named by the advisory: Red Hat package: gimp.
Medium [CVE-2026-6694] gimp file-png plugin: denial of service via oversized apng trns chunk
A flaw was found in GIMP's file-png plugin. A remote attacker can exploit this by crafting a malicious Animated Portable Network Graphics (APNG) image containing an oversized tRNS chunk. When processing a specially crafted APNG image, the plugin may crash due to a stack buffer overflow. As GIMP executes plugins in separate processes, the main application remains unaffected, limiting the impact to the plugin's functionality. Red Hat severity: Moderate — CVSS 5.5 (CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H). Weakness: CWE-120. Affected Red Hat products: Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9. Red Hat does not currently list a fixing RHSA for this CVE. Affected products named by the advisory: Red Hat package: gimp.
Medium [CVE-2026-59652] LDAP filter injection in legacy jdk1.4 LDAPStoreHelper
In Bouncy Castle for Java before 1.85, LDAP filter injection in legacy jdk1.4 LDAPStoreHelper. This vulnerability allows for LDAP filter injection, where an attacker could provide specially crafted input. This could lead to unauthorized information disclosure or modification of data from the Lightweight Directory Access Protocol (LDAP) directory. Red Hat products only ship jdk15 / jdk18 based artifacts. Red hat products are not affected by this vulnerability. Red Hat severity: Moderate — CVSS 6.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N). Weakness: CWE-90.
Medium [CVE-2026-18573] Client access-type policy condition bypass during client update
A flaw was found in the keycloak-services component of Keycloak, which is used for managing authentication and authorization flows. The issue occurs when a realm administrator configures client policies to enforce specific authentication requirements on confidential clients. Due to improper evaluation of the client state during an update operation, an attacker with client management permissions can bypass these security policies by first creating a public client and then updating it to a confidential client with weaker authentication. This can result in the persistence of clients that do not comply with the intended security hardening of the realm. The Red Hat Product Security team has assessed the severity of this vulnerability as Moderate, given that exploitation requires existing client management privileges or a dynamic registration token. Successful exploitation allows an attacker to bypass realm-specific client policy conditions and persist confidential clients with weaker authentication than required by policy. The vulnerability's root cause is the evaluation of update operations against the previous client state rather than the proposed new state. Weakness: CWE-862. Affected Red Hat products: Red Hat build of Keycloak 26.6; Red Hat build of Keycloak 26.6.7.
Medium [CVE-2026-18572] UMA claim token can override authorization time-policy evaluation attributes
Keycloak provides authorization services that allow administrators to restrict access to resources based on time policies (for example, only allowing access during business hours). A flaw was discovered where a user can include a fake time value in their authorization request that overrides the actual server time. This allows the user to bypass these time-based restrictions and access protected resources at unauthorized times. The Red Hat Product Security team has assessed the severity of this vulnerability as Moderate, given that exploitation requires the attacker to be an authenticated user and the target resource must be specifically protected by a time-based authorization policy. Successful exploitation allows an attacker to bypass temporal access controls and obtain permissions outside of allowed time windows. The vulnerability's root cause is the improper merging of user-supplied claims which allows them to overwrite trusted server-side evaluation attributes. Weakness: CWE-863. Affected Red Hat products: Red Hat build of Keycloak 26.6; Red Hat build of Keycloak 26.6.7. Red Hat lists Red Hat Data Grid 8; Red Hat JBoss Enterprise Application Platform Expansion Pack; Red Hat Single Sign-On 7 as not affected. Red Hat fixing advisory: RHSA-2026:68277, RHSA-2026:68278.