{"schema_version": "1.7.0", "id": "RLSA-2026:70642", "modified": "2026-09-25T06:14:24.043215Z", "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"], "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.", "severity": [{"type": "CVSS_V3", "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H"}], "affected": [{"package": {"ecosystem": "Rocky Linux:9", "name": "thunderbird", "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"}}]}], "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"}], "credits": [{"name": "Rocky Enterprise Software Foundation"}, {"name": "Red Hat"}], "database_specific": {"license": "CC-BY-4.0", "license_url": "https://creativecommons.org/licenses/by/4.0/", "source_advisory": "RHSA-2026:70642"}}