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High [CVE-2026-58221] authenticated LDAP access to internal LDB special DNs permits domain takeover
authenticated LDAP access to internal LDB special DNs permits domain takeover. Red Hat rates this important (CVSS 8.8). Weakness: CWE-284.
High [CVE-2026-59248] Denial of Service due to unbounded HPACK/QPACK prefixed-integer decoding
Allocation of resources without limits vulnerability in ninenines cowlib allows an unauthenticated remote HTTP/2 or HTTP/3 peer to exhaust memory on the vulnerable server (or client) and cause a denial of service. The HPACK and QPACK prefixed-integer decoder cow_hpack_common:dec_big_int/3 in src/cow_hpack_common.hrl (invoked from cow_hpack:decode/2 in src/cow_hpack.erl and from cow_qpack:decode_field_section/3 in src/cow_qpack.erl) reads continuation octets until it sees one whose high bit is clear, evaluating Int + (Value bsl M) at each step with the shift M growing by seven per octet. No limit is enforced on the number of continuation octets, on the resulting bit width, or on the value; the decoder consumes whatever encoded length the peer supplies. Because Erlang integers are immutable, each intermediate Value bsl M and each accumulator update allocates a fresh bignum whose digit width grows linearly with the number of octets processed so far. Summed across the whole decode, the transient bignum digit materialization is on the order of the square of the encoded length. A single maximal HPACK indexed representation carried inside one HTTP/2 HEADERS plus one CONTINUATION frame at Cowboy's default max_frame_size_received can force hundreds of megabytes of transient allocation and garbage-collection churn before the resulting header-table index is rejected as invalid.
Medium [CVE-2026-54620] Use-After-Free vulnerability in SQLite aggregate function callbacks
Use-After-Free vulnerability in SQLite aggregate function callbacks. Red Hat rates this moderate (CVSS 4.5). Weakness: CWE-825.
Medium [CVE-2026-54619] Use-after-free when redefining SQLite functions with different arity
Use-after-free when redefining SQLite functions with different arity. Red Hat rates this moderate (CVSS 4.5). Weakness: CWE-825.
Medium [CVE-2026-71192] S3API cross-tenant object read via Swift-native header injection
S3API cross-tenant object read via Swift-native header injection. Red Hat rates this moderate (CVSS 6.5). Weakness: CWE-863.
Medium [CVE-2026-66299] Denial of Service via WebSocket chat example
Denial of Service via WebSocket chat example. Red Hat rates this moderate (CVSS 5.3). Weakness: CWE-770.
Medium [CVE-2026-18047] ACME admin enable/disable endpoint authentication bypass via trailing slash
A flaw was found in Dogtag PKI's ACME responder where the web.xml security constraints use exact URL pattern matching for admin-only enable/disable endpoints. By appending a trailing slash to the URL, an unauthenticated attacker can bypass the Tomcat authentication constraint while RESTEasy still routes the request to the handler, allowing unauthorized toggling of the ACME service state including persistent denial of service. Red Hat rates this as Moderate because the impact of the authentication bypass is limited in scope and consequence. The vulnerability only affects the ACME enable/disable admin endpoints — other PKI subsystems (CA, KRA, OCSP, TPS) enforce authorization at the application layer and are not affected by this flaw. An attacker who exploits this flaw can only toggle the ACME service on or off. While re-enabling a disabled ACME service restores the full ACME protocol stack, certificate issuance through ACME still requires completing the standard RFC 8555 challenge-response flow, including proof of domain control — the enable/disable bypass alone does not grant the ability to obtain certificates. The ACME responder requires explicit installation and deployment and is not present in default PKI server configurations. Red Hat severity: Moderate — CVSS 6.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L). Weakness: CWE-288.
Medium [CVE-2026-58216] kpasswd service: kpasswd packet that contains malformed ASN.1 might cause the server to access 6 bytes of unallocated memory leading server to crash
kpasswd service: kpasswd packet that contains malformed ASN.1 might cause the server to access 6 bytes of unallocated memory leading server to crash. Red Hat rates this moderate (CVSS 5.3). Weakness: CWE-125.
Medium [CVE-2026-58218] DNS signing DoS via TKEY name cache exhaustion
DNS signing DoS via TKEY name cache exhaustion. Red Hat rates this moderate (CVSS 5.3). Weakness: CWE-410.
Medium [CVE-2026-58224] CTDB fails to do integrity checking of received packets
CTDB fails to do integrity checking of received packets. Red Hat rates this moderate (CVSS 6.5). Weakness: CWE-353. Affected product named by the advisory: Red Hat Enterprise Linux 7.
Medium [CVE-2024-14041] Bouncy Castle for Java: Private key recovery via timing side-channel in ML-KEM (CRYSTALS-Kyber) routines
Bouncy Castle for Java: Private key recovery via timing side-channel in ML-KEM (CRYSTALS-Kyber) routines. Red Hat rates this moderate (CVSS 5.9). Weakness: CWE-208. Affected product named by the advisory: Red Hat JBoss Enterprise Application Platform Expansion Pack.
Low [CVE-2026-6879] Performance degradation in XML processing due to quadratic time complexity
Performance degradation in XML processing due to quadratic time complexity. Red Hat rates this low (CVSS 2.2). Weakness: CWE-770. Red Hat lists fixing advisory RHSA-2026:54534 with package python3-12-main-3.12.13-3.8.hum1, python3-10-main-3.10.20-3.2.hum1, python3-14-main-3.14.7-1.hum1, python3-14-main-3.14.6-2.2.hum1.
Low [CVE-2026-58341] CSRF risk in group messaging state toggle
CSRF risk in group messaging state toggle. Red Hat rates this moderate (CVSS 3.5). Weakness: CWE-22.
Low [CVE-2026-17072] 4-byte heap over-read in gst_matroska_parse_flac_stream_headers when parsing FLAC codec data in Matroska containers
A flaw was found in GStreamer's gst-plugins-good. A heap-based out-of-bounds read of 4 bytes can occur when parsing FLAC audio stream headers embedded in a Matroska or WebM container file. The vulnerability is triggered by a boundary check that does not account for the full size of the data being copied, allowing a small read past the end of the allocated buffer. An attacker could exploit this by crafting a malicious Matroska or WebM file and tricking a user into opening it, potentially leaking a small amount of adjacent heap memory. This vulnerability is rated as Low severity because the out-of-bounds read is limited to 4 bytes, is read-only (no memory corruption), and the read cannot be directly observed or controlled by a remote attacker. User interaction is required to trigger it, as a victim must open a crafted Matroska or WebM media file. In practice, modern heap allocators align allocations such that the 4 overread bytes typically fall within adjacent allocated memory, making a crash unlikely in production builds. Red Hat Enterprise Linux 8, 9, 10, and Red Hat In-Vehicle OS 2 ship gstreamer1-plugins-good with the affected Matroska demuxer code path and are affected. All RHEL and RHIVOS streams are deferred (low severity, low exploitability). Red Hat severity: Low — CVSS 3.3 (CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N). Weakness: CWE-125.
High [CVE-2026-64649] Server-Side Request Forgery via malicious host redirection in Server Actions
Next.js is a React framework for building full-stack web applications. In versions 14.1.1 through 15.5.20 and 16.0.0 through 16.2.10, when a Server Action forwards or redirects a request, an attacker can cause the server to send that outbound request to a malicious host (Server-Side Request Forgery). This requires the attacker's request to control Host-associated headers. In some configurations, it's also possible to obtain internal values that weaken middleware/proxy authorization. Applications that use Server Actions are affected when the incoming host header is not fixed to a trusted value. This typically occurs on custom servers, or on deployments not behind a proxy that pins the host. Managed hosting pins the host upstream and is not affected; next start and standalone output do the same from version 14.2 onward. This issue has been fixed in versions 15.5.21 and 16.2.11. This can lead to Server-Side Request Forgery (SSRF), where the server is tricked into making requests to an attacker-controlled host. Such an attack could potentially expose internal system information or bypass authorization controls. This Important Server-Side Request Forgery (SSRF) flaw in Next.js Server Actions allows an attacker to redirect outbound requests to a malicious host.
High [CVE-2026-64648] Information disclosure via server-side fetch cache
Next.js is a React framework for building full-stack web applications. In versions 12.0.0 through 15.5.20 and 16.0.0 through 16.2.10, a server-side fetch with a request body may return a cached response body from a different request to the same URL but different body. Confidential data in the POST's response body would then leak to unauthorized requests. Though the request itself will not be deduped. This only applies to fetch calls with a request that has a different init than the one passed to fetch. An unsafe request would be: fetch(new Request(init), aDifferentInit). This issue has been fixed in versions 15.5.21 and 16.2.11. A flaw was found in Next.js. The vulnerability is triggered by specific unsafe fetch patterns where the request object's initialization differs from the fetch call's initialization. Red Hat customers using Next.js applications should review their fetch implementations, noting that applications built with Pages Router are not impacted. Red Hat severity: Important — CVSS 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N). Weakness: CWE-524. Affected Red Hat products: Streams for Apache Kafka 3.2.1; Red Hat Enterprise Linux AI (RHEL AI) 3; streams for Apache Kafka 2. Red Hat lists Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat Trusted Artifact Signer as not affected.
High [CVE-2026-12383] ExternalEventStreamViewSet trusts Subject header without validation and leaks expected DN
ExternalEventStreamViewSet trusts Subject header without validation and leaks expected DN. Red Hat rates this important (CVSS 7.5). Weakness: CWE-345. Red Hat lists fixing advisory RHSA-2026:50340 with package automation-eda-controller-0:1.2.11-1.el9ap, ansible-automation-platform-27/eda-controller-rhel9:1785374869, automation-eda-controller-0:1.1.21-1.el9ap, automation-eda-controller-0:1.1.21-1.el8ap. Affected products named by the advisory: Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 8.
High [CVE-2026-66759] out-of-bounds read in file-icns plugin causes information disclosure or crash on crafted ICNS images
A flaw was found in the file-icns plugin in GIMP. When applying a decompressed mask during ICNS image processing, the plugin reads from the mask data buffer without verifying if the cursor exceeds the allocated resource size. If a crafted file contains a truncated mask resource, the icns_decompress function continues reading past the bounds of the buffer. This out-of-bounds read vulnerability results in information disclosure of heap contents, where memory contents are leaked as alpha channel pixel values, or a crash leading to a denial of service if unmapped memory is accessed. To exploit this vulnerability, an attacker needs to convince a user to process a specially crafted ICNS image with GIMP, reducing the likelihood of exploitation. Due to this reason, this flaw has been rated with a moderate severity. Red Hat severity: Moderate — CVSS 7.1 (CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H). Weakness: CWE-125. Affected Red Hat products: Red Hat Enterprise Linux 9. Red Hat fixing advisory: RHSA-2026:50817. Affected products named by the advisory: Red Hat package: gimp.
High [CVE-2026-66758] integer overflow in file-fits plugin causes a heap-based buffer overflow on crafted FITS images
A flaw was found in the file-fits plugin in GIMP. If a crafted file sets both values to large values, their product exceeds 2^31 and overflows, resulting in an undersized heap-based buffer allocation. This integer overflow issue results in a heap-based buffer overflow when cfitsio subsequently writes a full row of pixels in the buffer, causing memory corruption, potentially leading to arbitrary code execution or a denial of service. To exploit this vulnerability, an attacker needs to convince a user to process a specially crafted FITS image with GIMP, reducing the likelihood of exploitation. However, successful exploitation may potentially lead to arbitrary code execution or a denial of service. Default Red Hat Enterprise Linux security features, including SELinux enforcement, Address Space Layout Randomization (ASLR) and NX (No-Execute) stack protection, significantly increase the difficulty of achieving arbitrary code execution, limiting the impact of this vulnerability. Due to this reason, this flaw has been rated with an important severity. Red Hat severity: Important — CVSS 7.8 (CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H). Weakness: CWE-190. Affected Red Hat products: Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8. Will not fix / out of support: Red Hat Enterprise Linux 6.
High [CVE-2026-64646] Denial of Service via excessive memory consumption in Server Actions
Next.js is a React framework for building full-stack web applications. In versions 13.0.0 through 15.5.20 and 16.0.0 through 16.2.10, requests targeting Next.js applications using App Router with at least one Server Action can lead to excessive memory consumption if that Server Actions uses the Edge runtime. This issue has been fixed in versions 15.5.21 and 16.2.11. A flaw was found in Next.js. This can lead to a denial of service (DoS) due to resource exhaustion. An Important denial of service flaw exists in Next.js applications utilizing the App Router with Server Actions configured to use the Edge runtime. This vulnerability can lead to excessive memory consumption, potentially causing service unavailability. Red Hat products that embed or deploy Next.js applications with this specific configuration are affected. Red Hat severity: Important — CVSS 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H). Weakness: CWE-770. Affected Red Hat products: Streams for Apache Kafka 3.2.1; Red Hat Enterprise Linux AI (RHEL AI) 3; streams for Apache Kafka 2. Red Hat lists Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat Trusted Artifact Signer as not affected. Red Hat fixing advisory: RHSA-2026:54435.