{"id":"RLSA-2026:70642","summary":"Important: thunderbird security update","details":"Mozilla Thunderbird is a standalone mail and newsgroup client.\n\nSecurity Fix(es):\n\n* firefox: thunderbird: Privilege escalation in the DOM: Workers component (CVE-2026-16365)\n\n* firefox: thunderbird: Sandbox escape in the Remote Settings Client component (CVE-2026-75874)\n\n* firefox: Sandbox escape due to use-after-free in the DOM: Security component (CVE-2026-84121)\n\n* firefox: Internally found bugs fixed in Firefox 155, Firefox ESR 153.2, Firefox ESR 140.15 and Firefox ESR 115.40 (CVE-2026-84145)\n\n* firefox: Sandbox escape due to use-after-free in the DOM: Navigation component (CVE-2026-84119)\n\n* firefox: Use-after-free in the Audio/Video component (CVE-2026-84120)\n\n* firefox: Privilege escalation due to invalid pointer in the Graphics component (CVE-2026-84131)\n\n* firefox: Use-after-free in the DOM: Core & HTML component (CVE-2026-84124)\n\n* firefox: Use-after-free in the Audio/Video component (CVE-2026-84122)\n\n* firefox: Internally found bugs fixed in Firefox 155, Firefox ESR 153.2 and Firefox ESR 140.15 (CVE-2026-84143)\n\n* thunderbird: Uninitialized memory in MIME parsing (CVE-2026-84639)\n\n* thunderbird: Information disclosure due to malicious IMAP server response (CVE-2026-84641)\n\n* thunderbird: One byte overflow read in mail parser (CVE-2026-84640)\n\n* firefox: thunderbird: Use-after-free in the SVG component (CVE-2026-92024)\n\n* firefox: thunderbird: Mitigation bypass in the Remote Settings Client component (CVE-2026-92019)\n\n* firefox: thunderbird: Use-after-free in the Networking component (CVE-2026-92026)\n\n* firefox: thunderbird: Information disclosure in the Graphics: ImageLib component (CVE-2026-92031)\n\n* firefox: thunderbird: Sandbox escape due to invalid pointer in the Graphics component (CVE-2026-92032)\n\n* firefox: thunderbird: Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component (CVE-2026-92010)\n\n* firefox: thunderbird: Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component (CVE-2026-92006)\n\n* firefox: thunderbird: Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component (CVE-2026-92011)\n\n* firefox: thunderbird: Use-after-free in the DOM: Streams component (CVE-2026-92027)\n\n* firefox: thunderbird: Use-after-free in the DOM: Core & HTML component (CVE-2026-92028)\n\n* firefox: thunderbird: Privilege escalation in the WebExtensions component (CVE-2026-92015)\n\n* firefox: thunderbird: Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component (CVE-2026-92013)\n\n* firefox: thunderbird: Use-after-free in the Disability Access APIs component (CVE-2026-92016)\n\n* firefox: thunderbird: Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component (CVE-2026-92012)\n\n* firefox: thunderbird: Use-after-free in the DOM: HTML Parser component (CVE-2026-92022)\n\n* firefox: thunderbird: Privilege escalation due to incorrect boundary conditions in the Graphics component (CVE-2026-92014)\n\n* firefox: thunderbird: Sandbox escape in the DOM: Core & HTML component (CVE-2026-92018)\n\n* firefox: thunderbird: Use-after-free in the JavaScript Engine: JIT component (CVE-2026-92021)\n\n* firefox: thunderbird: Use-after-free in the Audio/Video: Web Codecs component (CVE-2026-92005)\n\n* firefox: thunderbird: Privilege escalation in the DOM: Service Workers component (CVE-2026-92017)\n\n* firefox: thunderbird: Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component (CVE-2026-92009)\n\n* firefox: thunderbird: Privilege escalation due to incorrect boundary conditions in the Graphics: WebRender component (CVE-2026-92020)\n\n* firefox: thunderbird: Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component (CVE-2026-92008)\n\n* firefox: thunderbird: Mitigation bypass in the DOM: Copy & Paste and Drag & Drop component (CVE-2026-92030)\n\n* firefox: thunderbird: Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component (CVE-2026-92007)\n\n* firefox: thunderbird: Use-after-free in the DOM: Navigation component (CVE-2026-92025)\n\n* firefox: thunderbird: Use-after-free in the SVG component (CVE-2026-92029)\n\n* firefox: thunderbird: Use-after-free in the XML component (CVE-2026-92023)\n\n* thunderbird: Out-of-bounds read in IMAP response parser (CVE-2026-92240)\n\n* thunderbird: Thunderbird: Out-of-bounds read via maliciously constructed IMAP line (CVE-2026-92239)\n\n* thunderbird: Thunderbird: Memory safety violations via maliciously crafted mail headers (CVE-2026-92238)\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.","modified":"2026-09-25T06:30:02.654546591Z","published":"2026-09-25T06:09:18.596271Z","upstream":["CVE-2026-16365","CVE-2026-75874","CVE-2026-84119","CVE-2026-84120","CVE-2026-84121","CVE-2026-84122","CVE-2026-84124","CVE-2026-84131","CVE-2026-84143","CVE-2026-84145","CVE-2026-84639","CVE-2026-84640","CVE-2026-84641","CVE-2026-92005","CVE-2026-92006","CVE-2026-92007","CVE-2026-92008","CVE-2026-92009","CVE-2026-92010","CVE-2026-92011","CVE-2026-92012","CVE-2026-92013","CVE-2026-92014","CVE-2026-92015","CVE-2026-92016","CVE-2026-92017","CVE-2026-92018","CVE-2026-92019","CVE-2026-92020","CVE-2026-92021","CVE-2026-92022","CVE-2026-92023","CVE-2026-92024","CVE-2026-92025","CVE-2026-92026","CVE-2026-92027","CVE-2026-92028","CVE-2026-92029","CVE-2026-92030","CVE-2026-92031","CVE-2026-92032","CVE-2026-92238","CVE-2026-92239","CVE-2026-92240"],"database_specific":{"license_url":"https://creativecommons.org/licenses/by/4.0/","source_advisory":"RHSA-2026:70642","license":"CC-BY-4.0"},"references":[{"type":"ADVISORY","url":"https://errata.rockylinux.org/RLSA-2026:70642"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2503504"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2517832"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2526753"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2526760"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2526764"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2526765"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2526767"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2526773"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2526778"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2526781"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2527113"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2527115"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2527116"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2533737"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2533740"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2533741"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2533742"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2533743"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2533747"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2533751"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2533753"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2533757"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2533758"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2533760"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2533762"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2533764"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2533769"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2533770"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2533771"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2533773"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2533774"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2533778"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2533779"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2533781"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2533786"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2533790"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2533791"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2533792"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2533793"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2533797"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2533799"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2534187"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2534197"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2534199"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:70642"}],"affected":[{"package":{"name":"thunderbird","ecosystem":"Rocky Linux:9","purl":"pkg:rpm/rocky-linux/thunderbird?distro=rocky-linux-9&epoch=0"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:140.16.0-1.el9_8"}],"database_specific":{"yum_repository":"AppStream"}}],"database_specific":{"source":"https://storage.googleapis.com/resf-osv-data/RLSA-2026:70642.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H"}],"credits":[{"name":"Rocky Enterprise Software Foundation"},{"name":"Red Hat"}]}