Red Hat Linux Security Advisories & CVEs
3200 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-2026-34743] Denial of Service via buffer overflow in index decoding
Denial of Service via buffer overflow in index decoding. Red Hat rates this moderate (CVSS 5.3). Weakness: CWE-131. Affected package(s): xz-main. Resolved in Red Hat advisory RHSA-2026:7647 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux.
Medium [CVE-2026-35414] Security bypass via mishandling of authorized_keys principals option
Security bypass via mishandling of authorized_keys principals option. Red Hat rates this moderate (CVSS 4.8). Weakness: CWE-168. Affected package(s): openssh, rhaiis/model-opt-cuda-rhel9:1780681984, rhui5/rhua-rhel9:1779798222, discovery/discovery-server-rhel9:1778101579, rhui5/installer-rhel9:1779798165. Resolved in Red Hat advisory RHSA-2026:14937 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 1.
Medium [CVE-2026-4325] Replay of action tokens via improper handling of single-use entries
Replay of action tokens via improper handling of single-use entries. Red Hat rates this moderate (CVSS 5.3). Weakness: CWE-653. Affected package(s): rhbk/keycloak-rhel9-operator:26.2, rhbk/keycloak-rhel9, rhbk/keycloak-operator-bundle:26.4.11, rhbk/keycloak-rhel9:26.2, rhbk/keycloak-operator-bundle:26.2.15, rhbk/keycloak-rhel9-operator:26.4. Resolved in Red Hat advisory RHSA-2026:6478 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux.
Medium [CVE-2026-2950] Prototype pollution allows deletion of built-in prototype properties via array path bypass
Prototype pollution allows deletion of built-in prototype properties via array path bypass. Red Hat rates this moderate (CVSS 6.5). Weakness: CWE-915. Affected package(s): nodejs20-main, rhdh/rhdh-hub-rhel9:1780930740, nodejs25-main, yarnpkg-main. Resolved in Red Hat advisory RHSA-2026:7655 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux.
Medium [CVE-2026-34043] Denial of Service via specially crafted array-like object serialization
Denial of Service via specially crafted array-like object serialization. Red Hat rates this moderate (CVSS 5.9). Weakness: CWE-835. Affected package(s): openshift4/ose-networking-console-plugin-rhel9:1778256287, dotnet8.0, openshift4/ose-networking-console-plugin-rhel9:1778644858, openshift4/ose-networking-console-plugin-rhel9:1779256322, openshift4/ose-networking-console-plugin-rhel9:1782211435, openshift4/ose-networking-console-plugin-rhel9:1778532500. Resolved in Red Hat advisory RHSA-2026:21291 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 1; Red Hat Enterprise Linux 8.
Medium [CVE-2026-5282] Out of bounds read in WebCodecs
Out of bounds read in WebCodecs. Red Hat rates this important (CVSS 6.5). Weakness: CWE-125. No fix erratum has been published yet; monitor the Red Hat CVE page and apply the RHSA when released. Affected product named by the advisory: Red Hat Enterprise Linux.
Medium [CVE-2026-5276] Insufficient policy enforcement in WebUSB
Insufficient policy enforcement in WebUSB. Red Hat rates this important (CVSS 6.5). Weakness: CWE-280. No fix erratum has been published yet; monitor the Red Hat CVE page and apply the RHSA when released. Affected product named by the advisory: Red Hat Enterprise Linux.
Medium [CVE-2026-33985] Information disclosure via heap memory out of bounds read
Information disclosure via heap memory out of bounds read. Red Hat rates this moderate (CVSS 5.3). Weakness: CWE-125. Affected package(s): freerdp. Resolved in Red Hat advisory RHSA-2026:19142 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 1.
Medium [CVE-2026-33982] Information disclosure and denial of service via heap-buffer-overflow read
Information disclosure and denial of service via heap-buffer-overflow read. Red Hat rates this moderate (CVSS 6.6). Weakness: CWE-125. Affected package(s): freerdp. Resolved in Red Hat advisory RHSA-2026:16014 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux 1.
Medium [CVE-2026-21711] Unauthorized inter-process communication due to missing Unix Domain Socket permission checks
Unauthorized inter-process communication due to missing Unix Domain Socket permission checks. Red Hat rates this moderate (CVSS 5.2). Weakness: CWE-940. Affected package(s): nodejs24, nodejs:24. Resolved in Red Hat advisory RHSA-2026:7350 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux 1.
Medium [CVE-2026-21713] Information disclosure via timing oracle in HMAC verification
Information disclosure via timing oracle in HMAC verification. Red Hat rates this moderate (CVSS 5.9). Weakness: CWE-208. Affected package(s): nodejs24, nodejs:24. Resolved in Red Hat advisory RHSA-2026:7350 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux 1.
Medium [CVE-2026-21714] Memory leak and Denial of Service via crafted HTTP/2 WINDOW_UPDATE frames
Memory leak and Denial of Service via crafted HTTP/2 WINDOW_UPDATE frames. Red Hat rates this moderate (CVSS 5.3). Weakness: CWE-772. Affected package(s): nodejs24, nodejs:24. Resolved in Red Hat advisory RHSA-2026:7350 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux 1.
Medium [CVE-2026-21717] Denial of Service via V8 string hashing mechanism due to predictable hash collisions
Denial of Service via V8 string hashing mechanism due to predictable hash collisions. Red Hat rates this moderate (CVSS 5.9). Weakness: CWE-328. Affected package(s): nodejs20-main, nodejs25-main, nodejs24, nodejs22-main, nodejs:24, nodejs24-main. Resolved in Red Hat advisory RHSA-2026:7350 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux 1.
Medium [CVE-2026-4046] Denial of Service via iconv() function with specific character sets
Denial of Service via iconv() function with specific character sets. Red Hat rates this moderate (CVSS 5.3). Weakness: CWE-617. Affected package(s): rhui5/haproxy-rhel9:1781525671, insights-proxy/insights-proxy-container-rhel9:1780420428, glibc, rhui5/installer-rhel9:1781525693, costmanagement/costmanagement-metrics-rhel9-operator:1780946239, rhui5/cds-rhel9:1781525684. Resolved in Red Hat advisory RHSA-2026:29197 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 1; Red Hat Enterprise Linux 8.
Medium [CVE-2026-21712] Denial of Service via malformed Internationalized Domain Name processing
Denial of Service via malformed Internationalized Domain Name processing. Red Hat rates this moderate (CVSS 6.5). Weakness: CWE-168. Affected package(s): nodejs24, nodejs:24. Resolved in Red Hat advisory RHSA-2026:7350 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux 1.
Medium [CVE-2026-5119] Information disclosure via cleartext transmission of cookies during HTTPS tunnel establishment
Information disclosure via cleartext transmission of cookies during HTTPS tunnel establishment. Red Hat rates this moderate (CVSS 5.9). Weakness: CWE-319. Affected package(s): libsoup, libsoup3. Resolved in Red Hat advisory RHSA-2026:13978 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 1; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 7.
Medium [CVE-2026-20643] Processing maliciously crafted web content may bypass Same Origin Policy
Processing maliciously crafted web content may bypass Same Origin Policy. Red Hat rates this moderate (CVSS 5.4). Weakness: CWE-346. Affected package(s): webkit2gtk3, webkitgtk4. Resolved in Red Hat advisory RHSA-2026:19206 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 7.
Medium [CVE-2026-20665] Processing maliciously crafted web content may prevent Content Security Policy from being enforced
Processing maliciously crafted web content may prevent Content Security Policy from being enforced. Red Hat rates this moderate (CVSS 5.4). Weakness: CWE-693. Affected package(s): webkit2gtk3, webkitgtk4. Resolved in Red Hat advisory RHSA-2026:19206 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 7.
Medium [CVE-2026-20691] A maliciously crafted webpage may be able to fingerprint the user
A maliciously crafted webpage may be able to fingerprint the user. Red Hat rates this moderate (CVSS 4.3). Weakness: CWE-497. Affected package(s): webkit2gtk3, webkitgtk4. Resolved in Red Hat advisory RHSA-2026:19206 — update the affected packages (`sudo dnf update`). Affected products named by the advisory: Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 7.
Medium [CVE-2026-28861] A malicious website may be able to access script message handlers intended for other origins
A malicious website may be able to access script message handlers intended for other origins. Red Hat rates this important (CVSS 4.3). Weakness: CWE-346. No fix erratum has been published yet; monitor the Red Hat CVE page and apply the RHSA when released. Affected product named by the advisory: Red Hat Enterprise Linux.