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High [CVE-2026-74938] Mitigation bypass in the JavaScript: GC component
Mitigation bypass in the JavaScript: GC component. Red Hat rates this important (CVSS 7.5). Weakness: CWE-807.
High [CVE-2026-74937] Use-after-free in the JavaScript: GC component
Use-after-free in the JavaScript: GC component. Red Hat rates this important (CVSS 7.5). Weakness: CWE-825.
High [CVE-2026-75874] Sandbox escape in the Remote Settings Client component
Sandbox escape in the Remote Settings Client component. Red Hat rates this important (CVSS 7.5). Weakness: CWE-653.
High [CVE-2026-74987] Internally found bugs fixed in Firefox ESR 140.14, Firefox ESR 153.1 and Firefox 154
Internally found bugs fixed in Firefox ESR 140.14, Firefox ESR 153.1 and Firefox 154. Red Hat rates this important (CVSS 7.5). Weakness: CWE-787. Red Hat lists fixing advisory RHSA-2026:58897 with package firefox-0:140.14.0-1.el10_2, firefox-0:140.14.0-1.el8_10, firefox-0:140.14.0-1.el9_8. Affected products named by the advisory: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9.
High [CVE-2026-74948] Information disclosure in the Graphics component
Information disclosure in the Graphics component. Red Hat rates this important (CVSS 7.5). Weakness: CWE-497. Red Hat lists fixing advisory RHSA-2026:58897 with package firefox-0:140.14.0-1.el10_2, firefox-0:140.14.0-1.el8_10, firefox-0:140.14.0-1.el9_8. Affected products named by the advisory: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9.
High [CVE-2026-74946] Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component
Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component. Red Hat rates this important (CVSS 7.5). Weakness: CWE-787. Red Hat lists fixing advisory RHSA-2026:58897 with package firefox-0:140.14.0-1.el10_2, firefox-0:140.14.0-1.el8_10, firefox-0:140.14.0-1.el9_8. Affected products named by the advisory: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9.
High [CVE-2026-74949] Privilege escalation due to use-after-free in the Graphics: Canvas2D component
Privilege escalation due to use-after-free in the Graphics: Canvas2D component. Red Hat rates this important (CVSS 7.5). Weakness: CWE-787. Red Hat lists fixing advisory RHSA-2026:58897 with package firefox-0:140.14.0-1.el10_2, firefox-0:140.14.0-1.el8_10, firefox-0:140.14.0-1.el9_8. Affected products named by the advisory: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9.
High [CVE-2026-74943] Use-after-free in the Graphics: ImageLib component
Use-after-free in the Graphics: ImageLib component. Red Hat rates this important (CVSS 7.5). Weakness: CWE-825. Red Hat lists fixing advisory RHSA-2026:58897 with package firefox-0:140.14.0-1.el10_2, firefox-0:140.14.0-1.el8_10, firefox-0:140.14.0-1.el9_8. Affected products named by the advisory: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9.
High [CVE-2026-74942] Privilege escalation in the Remote Settings Client component
Privilege escalation in the Remote Settings Client component. Red Hat rates this important (CVSS 7.5). Weakness: CWE-266. Red Hat lists fixing advisory RHSA-2026:58897 with package firefox-0:140.14.0-1.el10_2, firefox-0:140.14.0-1.el8_10, firefox-0:140.14.0-1.el9_8. Affected products named by the advisory: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9.
High [CVE-2026-74944] Use-after-free in the DOM: Core & HTML component
Use-after-free in the DOM: Core & HTML component. Red Hat rates this important (CVSS 7.5). Weakness: CWE-825. Red Hat lists fixing advisory RHSA-2026:58897 with package firefox-0:140.14.0-1.el10_2, firefox-0:140.14.0-1.el8_10, firefox-0:140.14.0-1.el9_8. Affected products named by the advisory: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9.
High [CVE-2026-74945] Information disclosure in the Graphics: Text component
Information disclosure in the Graphics: Text component. Red Hat rates this important (CVSS 7.5). Weakness: CWE-201. Red Hat lists fixing advisory RHSA-2026:58897 with package firefox-0:140.14.0-1.el10_2, firefox-0:140.14.0-1.el8_10, firefox-0:140.14.0-1.el9_8. Affected products named by the advisory: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9.
High [CVE-2026-74941] Privilege escalation in the Graphics: CanvasWebGL component
Privilege escalation in the Graphics: CanvasWebGL component. Red Hat rates this important (CVSS 7.5). Weakness: CWE-266. Red Hat lists fixing advisory RHSA-2026:58897 with package firefox-0:140.14.0-1.el10_2, firefox-0:140.14.0-1.el8_10, firefox-0:140.14.0-1.el9_8. Affected products named by the advisory: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9.
High [CVE-2026-74940] Use-after-free in the Graphics: Text component
Use-after-free in the Graphics: Text component. Red Hat rates this important (CVSS 7.5). Weakness: CWE-825. Red Hat lists fixing advisory RHSA-2026:58897 with package firefox-0:140.14.0-1.el10_2, firefox-0:140.14.0-1.el8_10, firefox-0:140.14.0-1.el9_8. Affected products named by the advisory: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9.
High [CVE-2026-74939] Privilege escalation in the DOM: Navigation component
Privilege escalation in the DOM: Navigation component. Red Hat rates this important (CVSS 7.5). Weakness: CWE-266. Red Hat lists fixing advisory RHSA-2026:58897 with package firefox-0:140.14.0-1.el10_2, firefox-0:140.14.0-1.el8_10, firefox-0:140.14.0-1.el9_8. Affected products named by the advisory: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9.
High [CVE-2026-74934] Site isolation issue in the Graphics: CanvasWebGL component
Site isolation issue in the Graphics: CanvasWebGL component. Red Hat rates this important (CVSS 7.5). Weakness: CWE-653. Red Hat lists fixing advisory RHSA-2026:58897 with package firefox-0:140.14.0-1.el10_2, firefox-0:140.14.0-1.el8_10, firefox-0:140.14.0-1.el9_8. Affected products named by the advisory: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9.
High [CVE-2026-74936] Use-after-free in the JavaScript: WebAssembly component
Use-after-free in the JavaScript: WebAssembly component. Red Hat rates this important (CVSS 7.5). Weakness: CWE-825. Red Hat lists fixing advisory RHSA-2026:58897 with package firefox-0:140.14.0-1.el10_2, firefox-0:140.14.0-1.el8_10, firefox-0:140.14.0-1.el9_8. Affected products named by the advisory: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9.
High [CVE-2026-74935] Privilege escalation in the DOM: Networking component
Privilege escalation in the DOM: Networking component. Red Hat rates this important (CVSS 7.5). Weakness: CWE-266. Red Hat lists fixing advisory RHSA-2026:58897 with package firefox-0:140.14.0-1.el10_2, firefox-0:140.14.0-1.el8_10, firefox-0:140.14.0-1.el9_8. Affected products named by the advisory: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9.
High [CVE-2026-75838] Cross-Site Scripting via IN_PLACE sanitization
Cross-Site Scripting via IN_PLACE sanitization. Red Hat rates this important (CVSS 7.3). Weakness: CWE-79. Affected products named by the advisory: Migration Toolkit for Virtualization; Multicluster Engine for Kubernetes; Node HealthCheck Operator; OpenShift Service Mesh 3; and 15 more. Affected products named by the advisory: Red Hat 3scale API Management Platform 2; Red Hat Advanced Cluster Management for Kubernetes 2; Red Hat Advanced Cluster Security 4; Red Hat Ansible Automation Platform 2; and 11 more.
High [CVE-2026-70906] Improve font loading (2026-08 Security Update)
Improve font loading (2026-08 Security Update). Red Hat rates this moderate (CVSS 7.5). Red Hat lists fixing advisory RHSA-2026:55799 with package java-25-openjdk-portable, java-25-openjdk-1:25.0.4.1.1-1.1.el9, java-25-openjdk-windows, java-25-openjdk-main-25.0.4.1.1-1.1.hum1. Affected products named by the advisory: Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 10.
High [CVE-2026-43794] Processing maliciously crafted web content may lead to memory corruption
Processing maliciously crafted web content may lead to memory corruption. Red Hat rates this important (CVSS 8.8). Weakness: CWE-120. Affected products named by the advisory: Red Hat Enterprise Linux 6; Red Hat package: webkitgtk.