Red Hat Linux Security Advisories & CVEs
10919 advisories tracked · Red Hat Security Data API · direct feeds checked every minute; rate-limited backstops use a safe source cadence
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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 Security Data API
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-2026-102295] Quay: quay: dom-based cross-site scripting via oauth local callback format=json parameter
A flaw was found in Quay. A cross-site scripting (XSS) vulnerability in the OAuth callback handler allows a remote attacker to execute arbitrary JavaScript code within a user's browser session. By tricking a logged-in user into visiting a specially crafted link, an attacker can exploit improper input sanitization to run client-side scripts in the application context. Successful exploitation could allow the attacker to compromise the user's session, access sensitive registry information, or perform unauthorized actions on their behalf. This flaw allows an attacker to craft a URL that, when visited by a logged-in Quay user, executes arbitrary JavaScript in the user's browser session. Exploitation requires user interaction (clicking a crafted link) and targets a non-default code path (format=json parameter). Red Hat severity: Moderate — CVSS 5.4 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N). Weakness: CWE-79. Affected Red Hat products: Red Hat Quay 3. Red Hat does not currently list a fixing RHSA for this CVE.
Medium [CVE-2026-105306] Token introspection audience bypass via Dynamic Client Registration
Token introspection audience bypass via Dynamic Client Registration. Red Hat rates this moderate (CVSS 6.5). Weakness: CWE-862. Affected product named by the advisory: Red Hat Build of Keycloak.
Medium [CVE-2026-105302] User Session Note mapper exposes upstream IdP access tokens
User Session Note mapper exposes upstream IdP access tokens. Red Hat rates this moderate (CVSS 5.7). Weakness: CWE-200. Affected product named by the advisory: Red Hat Build of Keycloak.
Medium [CVE-2026-105301] Blind SSRF via X.509 authenticator fetching attacker-controlled CRL-DP/OCSP URLs
Blind SSRF via X.509 authenticator fetching attacker-controlled CRL-DP/OCSP URLs. Red Hat rates this moderate (CVSS 4). Weakness: CWE-918. Affected product named by the advisory: Red Hat Build of Keycloak.
Low [CVE-2026-104029] Sssd: sssd: denial of service via out-of-bounds read in autofs responder
A flaw was found in SSSD. A local attacker can exploit this vulnerability by sending a specially crafted request to the autofs responder UNIX socket. Due to improper buffer offset calculation during request parsing, the service performs an out-of-bounds memory read. This flaw can cause the autofs responder process to crash, resulting in a denial of service (DoS). Red Hat rates this vulnerability as a Low impact because exploitation is restricted to local attackers and primarily leads to responder termination or instability without granting privilege escalation or data leakage. The autofs responder in SSSD must be explicitly enabled and active for the vulnerable UNIX domain socket to be present. Additionally, any resulting crash affects only the autofs responder daemon rather than the core authentication services or entire operating system. Red Hat severity: Low — CVSS 3.3 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L). 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. Red Hat does not currently list a fixing RHSA for this CVE.
Low [CVE-2026-105326] Cups: cups: argument injection in mailto notifier via notify-recipient-uri
An argument injection flaw was found in CUPS. When email notification is configured, the CUPS scheduler accepts printer subscription requests that supply a mailto notify-recipient-uri. The mailto notifier passes the recipient address to the configured sendmail program without ensuring it cannot be interpreted as command-line options. A remote attacker who can reach the CUPS service could supply a crafted recipient value starting with "-" to influence sendmail behavior. Successful exploitation depends on the installed mail transfer agent and CUPS network exposure, and may lead to execution of attacker-controlled commands with the privileges of the CUPS service user. This vulnerability is rated Low because exploitation requires multiple environmental conditions beyond the CUPS code flaw alone. The vulnerable mailto notifier logic is present in CUPS packages shipped in Red Hat Enterprise Linux, but practical impact on RHEL is limited: RHEL typically provides Postfix's sendmail-compatible wrapper, which does not support the traditional sendmail -C configuration option used in public proof-of-concept chains, and many systems do not install or enable an MTA for CUPS notifications. By default, cupsd listens only on the local loopback interface unless administrators explicitly configure remote access.
High [CVE-2026-105163] Signature verification bypass via separate image tag resolution
Signature verification bypass via separate image tag resolution. Red Hat rates this important (CVSS 8.1). Weakness: CWE-367. Affected product named by the advisory: Red Hat OpenShift Container Platform 4.
Low [CVE-2026-105217] Sensitive token disclosure via disabled TLS certificate verification
Sensitive token disclosure via disabled TLS certificate verification. Red Hat rates this low (CVSS 3.7). Weakness: CWE-295. Affected products named by the advisory: Red Hat Enterprise Linux 10; 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: cockpit.
Low [CVE-2026-105083] Security policy bypass via alternate XML DOCTYPE declaration
Security policy bypass via alternate XML DOCTYPE declaration. Red Hat rates this low (CVSS 3.9). Weakness: CWE-1286. Affected products named by the advisory: Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat package: imagemagick.
High [CVE-2026-104873] Authorization bypass via improper resource handler registration
Authorization bypass via improper resource handler registration. Red Hat rates this important (CVSS 8.1). Weakness: CWE-430. Affected products named by the advisory: Ansible Automation Orchestrator 2026; Exploit Intelligence; Migration Toolkit for Applications 8; OpenShift Lightspeed; and 2 more. Affected products named by the advisory: Red Hat Ansible Automation Platform 2; Red Hat OpenShift AI (RHOAI).
High [CVE-2026-104988] EST fullcmc authentication bypass allows certificate mis-issuance with arbitrary subject
EST fullcmc authentication bypass allows certificate mis-issuance with arbitrary subject. Red Hat rates this important (CVSS 8.1). Weakness: CWE-290. Affected products named by the advisory: Red Hat Certificate System 10; Red Hat Certificate System 11.
High [CVE-2026-104861] Denial of Service via crafted SVG input
Denial of Service via crafted SVG input. Red Hat rates this important (CVSS 7.5). Weakness: CWE-1333. Affected products named by the advisory: Red Hat Discovery 2; Red Hat OpenShift AI (RHOAI).
High [CVE-2026-104854] Arbitrary code execution via insecure socket permissions
Arbitrary code execution via insecure socket permissions. Red Hat rates this important (CVSS 7.8). Weakness: CWE-379.
High [CVE-2026-104851] Arbitrary code execution via crafted reference documents
Arbitrary code execution via crafted reference documents. Red Hat rates this important (CVSS 8.8). Weakness: CWE-94. Affected products named by the advisory: Exploit Intelligence; Lightspeed Core; OpenShift Lightspeed; Red Hat AI Inference Server; and 4 more. Affected products named by the advisory: Red Hat Ansible Automation Platform 2; Red Hat Enterprise Linux AI (RHEL AI) 3; Red Hat OpenShift AI (RHOAI); Red Hat Satellite 6.
High [CVE-2026-104845] Denial of Service via unbounded memory allocation during deserialization
Denial of Service via unbounded memory allocation during deserialization. Red Hat rates this important (CVSS 7.5). Weakness: CWE-770. Affected product named by the advisory: Ansible Automation Orchestrator 2026.
High [CVE-2026-104843] Arbitrary code execution via malicious package extraction on Windows
Arbitrary code execution via malicious package extraction on Windows. Red Hat rates this important (CVSS 7.8). Weakness: CWE-22. Affected products named by the advisory: Lightspeed Core; Lightspeed Services for Advanced Cluster Management; OpenShift Lightspeed; Red Hat AI Inference Server; and 2 more. Affected products named by the advisory: Red Hat Enterprise Linux AI (RHEL AI) 3; Red Hat OpenShift AI (RHOAI).
High [CVE-2026-66054] Denial of Service via improper handling of compressed data
Denial of Service via improper handling of compressed data. Red Hat rates this important (CVSS 7.5). Weakness: CWE-409. Red Hat lists fixing advisory RHSA-2026:74369 with package thrift-main-0.25.0-0.1.hum1. Affected products named by the advisory: Red Hat Hardened Images; Red Hat Ceph Storage 7; Red Hat Ceph Storage 8; Red Hat Ceph Storage 9; and 1 more. Affected products named by the advisory: Red Hat Enterprise Linux AI (RHEL AI) 3.
High [CVE-2026-66081] Denial of Service via uninitialized pointer access in c_glib bindings
Denial of Service via uninitialized pointer access in c_glib bindings. Red Hat rates this important. Weakness: CWE-824. Red Hat lists fixing advisory RHSA-2026:74369 with package thrift-main-0.25.0-0.1.hum1. Affected products named by the advisory: Red Hat Hardened Images; Red Hat Ceph Storage 7; Red Hat Ceph Storage 8; Red Hat Ceph Storage 9; and 1 more. Affected products named by the advisory: Red Hat Enterprise Linux AI (RHEL AI) 3.
High [CVE-2026-66837] Denial of Service via buffer overflow in PHP bindings
Denial of Service via buffer overflow in PHP bindings. Red Hat rates this important (CVSS 7.5). Weakness: CWE-787. Red Hat lists fixing advisory RHSA-2026:74369 with package thrift-main-0.25.0-0.1.hum1. Affected products named by the advisory: Red Hat Hardened Images; Red Hat Ceph Storage 7; Red Hat Ceph Storage 8; Red Hat Ceph Storage 9; and 1 more. Affected products named by the advisory: Red Hat Enterprise Linux AI (RHEL AI) 3.
High [CVE-2026-66858] Denial of Service via deeply nested unknown fields
Denial of Service via deeply nested unknown fields. Red Hat rates this important (CVSS 7.5). Weakness: CWE-770. Red Hat lists fixing advisory RHSA-2026:74369 with package thrift-main-0.25.0-0.1.hum1. Affected products named by the advisory: Red Hat Hardened Images; Red Hat Ceph Storage 7; Red Hat Ceph Storage 8; Red Hat Ceph Storage 9; and 1 more. Affected products named by the advisory: Red Hat Enterprise Linux AI (RHEL AI) 3.