{"id":"ALSA-2026:58899","summary":"Important: firefox security update","details":"Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability.  \n\nSecurity Fix(es):  \n\n  * firefox: thunderbird: Mitigation bypass in the Data Loss Prevention component (CVE-2026-74983)\n  * firefox: thunderbird: Site isolation issue in the Graphics: CanvasWebGL component (CVE-2026-74934)\n  * firefox: thunderbird: Privilege escalation in the Networking: Cookies component (CVE-2026-74953)\n  * firefox: thunderbird: Internally found bugs fixed in Firefox ESR 140.14, Firefox ESR 153.1 and Firefox 154 (CVE-2026-74987)\n  * firefox: thunderbird: Information disclosure in the Graphics component (CVE-2026-74948)\n  * firefox: thunderbird: Use-after-free in the Graphics: ImageLib component (CVE-2026-74943)\n  * firefox: thunderbird: Information disclosure in the DOM: UI Events & Focus Handling component (CVE-2026-74971)\n  * firefox: thunderbird: Privilege escalation in the Graphics: CanvasWebGL component (CVE-2026-74941)\n  * firefox: Privilege escalation in the Shell Integration component (CVE-2026-74965)\n  * firefox: thunderbird: Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component (CVE-2026-74946)\n  * firefox: Race condition, use-after-free in the Graphics component (CVE-2026-74973)\n  * firefox: thunderbird: Privilege escalation due to use-after-free in the Graphics: Canvas2D component (CVE-2026-74949)\n  * firefox: thunderbird: Internally found bugs fixed in Firefox ESR 115.39, Firefox ESR 140.14, Firefox ESR 153.1 and Firefox 154 (CVE-2026-74990)\n  * firefox: thunderbird: Use-after-free in the JavaScript: WebAssembly component (CVE-2026-74936)\n  * firefox: thunderbird: Use-after-free in the Graphics: Text component (CVE-2026-74940)\n  * firefox: thunderbird: Site isolation issue in the WebExtensions component (CVE-2026-74960)\n  * firefox: thunderbird: Use-after-free in the Layout: Text and Fonts component (CVE-2026-74969)\n  * firefox: thunderbird: Mitigation bypass in the Storage: Cache API component (CVE-2026-74959)\n  * firefox: thunderbird: JIT miscompilation in the JavaScript Engine: JIT component (CVE-2026-74976)\n  * firefox: thunderbird: Same-origin policy bypass in the Graphics: ImageLib component (CVE-2026-74974)\n  * firefox: thunderbird: Mitigation bypass in the Safe Browsing component (CVE-2026-74957)\n  * firefox: thunderbird: Same-origin policy bypass in the Audio/Video: Playback component (CVE-2026-74967)\n  * firefox: Privilege escalation in the Remote Settings Client component (CVE-2026-74942)\n  * firefox: thunderbird: Privilege escalation in the DOM: Navigation component (CVE-2026-74939)\n  * firefox: thunderbird: Information disclosure in the DOM: Push Subscriptions component (CVE-2026-74972)\n  * firefox: thunderbird: Information disclosure in the Graphics: Text component (CVE-2026-74945)\n  * firefox: thunderbird: Same-origin policy bypass in the Networking: Cookies component (CVE-2026-74963)\n  * firefox: thunderbird: Use-after-free in the DOM: Core & HTML component (CVE-2026-74944)\n  * firefox: Integer overflow in the Graphics component (CVE-2026-74964)\n  * firefox: Site isolation issue in the Networking: Cookies component (CVE-2026-74962)\n  * firefox: thunderbird: Privilege escalation in the DOM: Networking component (CVE-2026-74935)\n\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n","modified":"2026-08-26T13:27:15.546877222Z","published":"2026-08-24T00:00:00Z","related":["CVE-2026-74934","CVE-2026-74935","CVE-2026-74936","CVE-2026-74939","CVE-2026-74940","CVE-2026-74941","CVE-2026-74942","CVE-2026-74943","CVE-2026-74944","CVE-2026-74945","CVE-2026-74946","CVE-2026-74948","CVE-2026-74949","CVE-2026-74953","CVE-2026-74957","CVE-2026-74959","CVE-2026-74960","CVE-2026-74962","CVE-2026-74963","CVE-2026-74964","CVE-2026-74965","CVE-2026-74967","CVE-2026-74969","CVE-2026-74971","CVE-2026-74972","CVE-2026-74973","CVE-2026-74974","CVE-2026-74976","CVE-2026-74983","CVE-2026-74987","CVE-2026-74990"],"references":[{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:58899"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-74934"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-74935"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-74936"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-74939"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-74940"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-74941"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-74942"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-74943"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-74944"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-74945"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-74946"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-74948"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-74949"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-74953"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-74957"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-74959"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-74960"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-74962"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-74963"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-74964"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-74965"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-74967"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-74969"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-74971"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-74972"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-74973"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-74974"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-74976"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-74983"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-74987"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-74990"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2517819"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2517820"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2517822"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2517823"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2517825"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2517826"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2517831"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2517833"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2517834"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2517835"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2517836"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2517837"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2517839"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2517840"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2517841"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2517845"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2517846"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2517849"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2517851"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2517853"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2517856"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2517858"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2517859"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2517860"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2517862"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2517863"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2517866"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2517868"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2517870"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2517872"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2517874"},{"type":"ADVISORY","url":"https://errata.almalinux.org/10/ALSA-2026-58899.html"}],"affected":[{"package":{"name":"firefox","ecosystem":"AlmaLinux:10","purl":"pkg:rpm/almalinux/firefox"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"140.14.0-1.el10_2"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux10/ALSA-2026:58899.json"}}],"schema_version":"1.9.0"}