{"schema_version": "1.7.0", "id": "RLSA-2026:93443", "modified": "2026-11-03T12:15:07.256854Z", "published": "2026-11-03T12:05:01.276494Z", "upstream": ["CVE-2026-109704", "CVE-2026-109705", "CVE-2026-109706", "CVE-2026-109707", "CVE-2026-109708", "CVE-2026-109709", "CVE-2026-109710", "CVE-2026-109711", "CVE-2026-109712", "CVE-2026-109713", "CVE-2026-109715", "CVE-2026-109716", "CVE-2026-109717", "CVE-2026-109718", "CVE-2026-109719", "CVE-2026-109720", "CVE-2026-109721", "CVE-2026-109722", "CVE-2026-109723", "CVE-2026-109724", "CVE-2026-109725", "CVE-2026-109726", "CVE-2026-109727", "CVE-2026-109728", "CVE-2026-109729", "CVE-2026-109730", "CVE-2026-109731", "CVE-2026-109732", "CVE-2026-109733", "CVE-2026-109734", "CVE-2026-109736", "CVE-2026-109737", "CVE-2026-109738", "CVE-2026-109740", "CVE-2026-109741", "CVE-2026-109742", "CVE-2026-109743", "CVE-2026-109744", "CVE-2026-109745", "CVE-2026-109751", "CVE-2026-109752", "CVE-2026-109753", "CVE-2026-109754", "CVE-2026-109756", "CVE-2026-109757", "CVE-2026-109759", "CVE-2026-109760", "CVE-2026-109762", "CVE-2026-109763", "CVE-2026-109764", "CVE-2026-109765", "CVE-2026-109766", "CVE-2026-109767", "CVE-2026-109770", "CVE-2026-109775", "CVE-2026-109776", "CVE-2026-109777", "CVE-2026-109778", "CVE-2026-109781", "CVE-2026-109782", "CVE-2026-109783", "CVE-2026-45186"], "summary": "Important: thunderbird security, bug fix, and enhancement update", "details": "Mozilla Thunderbird is a standalone mail and newsgroup client.\n\nSecurity Fix(es):\n\n* libexpat: denial of service via crafted XML input (CVE-2026-45186)\n\n* firefox: Mitigation bypass in the Enterprise Policies component (CVE-2026-109764)\n\n* firefox: Spoofing issue in the DOM: Web Serial component (CVE-2026-109770)\n\n* firefox: Mitigation bypass in the File Handling component (CVE-2026-109783)\n\n* firefox: thunderbird: Privilege escalation in the Application Update component (CVE-2026-109704)\n\n* firefox: Use-after-free in the XML component (CVE-2026-109718)\n\n* firefox: Information disclosure in the PDF Viewer component (CVE-2026-109742)\n\n* firefox: Incorrect boundary conditions in the JavaScript Engine component (CVE-2026-109715)\n\n* firefox: firefox: Sandbox escape via incorrect boundary conditions in Win32 widget (CVE-2026-109740)\n\n* firefox: Use-after-free in the Storage: IndexedDB component (CVE-2026-109706)\n\n* firefox: Use-after-free in the Crash Reporting component (CVE-2026-109713)\n\n* firefox: Use-after-free in the DOM: Core & HTML component (CVE-2026-109724)\n\n* firefox: Sandbox escape due to uninitialized memory in the DOM: Web Serial component (CVE-2026-109745)\n\n* firefox: Mitigation bypass in the File Handling component (CVE-2026-109782)\n\n* firefox: Information disclosure, privilege escalation in the Security: Process Sandboxing component (CVE-2026-109709)\n\n* firefox: Sandbox escape, site isolation issue due to incorrect boundary conditions, use-after-free in the Networking component (CVE-2026-109705)\n\n* firefox: Use-after-free in the Audio/Video: Playback component (CVE-2026-109738)\n\n* firefox: Sandbox escape due to race condition in the Networking component (CVE-2026-109757)\n\n* firefox: Use-after-free in the Storage: Bucket File System component (CVE-2026-109741)\n\n* firefox: Use-after-free in the JavaScript Engine: JIT component (CVE-2026-109729)\n\n* firefox: Other issue in the DOM: File component (CVE-2026-109744)\n\n* firefox: Incorrect boundary conditions in the JavaScript Engine component (CVE-2026-109716)\n\n* firefox: Race condition, use-after-free in the Graphics: CanvasWebGL component (CVE-2026-109719)\n\n* firefox: Incorrect boundary conditions in the Layout component (CVE-2026-109753)\n\n* firefox: Integer overflow in the Layout: Text and Fonts component (CVE-2026-109723)\n\n* firefox: Privilege escalation in the DOM: Navigation component (CVE-2026-109756)\n\n* firefox: JIT miscompilation in the JavaScript Engine: JIT component (CVE-2026-109733)\n\n* firefox: thunderbird: Mitigation bypass in the DOM: Security component (CVE-2026-109734)\n\n* firefox: Mitigation bypass in the File Handling component (CVE-2026-109763)\n\n* firefox: Sandbox escape due to incorrect boundary conditions in the Networking component (CVE-2026-109708)\n\n* firefox: Use-after-free in the DOM: Bindings (WebIDL) component (CVE-2026-109717)\n\n* firefox: Use-after-free in the DOM: Workers component (CVE-2026-109752)\n\n* firefox: Race condition in the XPCOM component (CVE-2026-109776)\n\n* firefox: Sandbox escape due to use-after-free in the Networking component (CVE-2026-109707)\n\n* firefox: Mitigation bypass in the Networking: HTTP component (CVE-2026-109760)\n\n* firefox: JIT miscompilation in the JavaScript: WebAssembly component (CVE-2026-109720)\n\n* firefox: Information disclosure in the Storage: IndexedDB component (CVE-2026-109777)\n\n* firefox: Use-after-free in the SVG component (CVE-2026-109726)\n\n* firefox: Integer overflow in the Graphics component (CVE-2026-109730)\n\n* firefox: Use-after-free in the Audio/Video component (CVE-2026-109727)\n\n* firefox: Mitigation bypass in the Enterprise Policies component (CVE-2026-109737)\n\n* firefox: Mitigation bypass in the Enterprise Policies component (CVE-2026-109766)\n\n* firefox: Use-after-free in the DOM: Streams component (CVE-2026-109732)\n\n* firefox: Site isolation issue in the Networking component (CVE-2026-109759)\n\n* firefox: Privilege escalation in the WebExtensions component (CVE-2026-109778)\n\n* firefox: Incorrect boundary conditions in the SVG component (CVE-2026-109762)\n\n* firefox: Race condition, use-after-free in the Graphics: Text component (CVE-2026-109765)\n\n* firefox: Incorrect boundary conditions in the DOM: Editor component (CVE-2026-109754)\n\n* firefox: Information disclosure in the Networking component (CVE-2026-109751)\n\n* firefox: Use-after-free in the DOM: Core & HTML component (CVE-2026-109725)\n\n* firefox: Sandbox escape due to uninitialized memory in the Graphics component (CVE-2026-109712)\n\n* firefox: Use-after-free in the Graphics: Canvas2D component (CVE-2026-109711)\n\n* firefox: Frame poisoning in the Layout component (CVE-2026-109736)\n\n* firefox: JIT miscompilation in the JavaScript Engine: JIT component (CVE-2026-109722)\n\n* firefox: Information disclosure in the Networking component (CVE-2026-109767)\n\n* firefox: Denial-of-service in the WebRTC component (CVE-2026-109775)\n\n* firefox: Use-after-free in the DOM: Animation component (CVE-2026-109728)\n\n* firefox: Denial-of-service in the Printing: Output component (CVE-2026-109781)\n\n* firefox: thunderbird: Use-after-free in the Graphics: Text component (CVE-2026-109710)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-109731)\n\n* firefox: Incorrect boundary conditions in the JavaScript Engine: JIT component (CVE-2026-109721)\n\n* firefox: Privilege escalation in the Panning and Zooming component (CVE-2026-109743)\n\nBug Fix(es) and Enhancement(s):\n\n* Thunderbird ESR 153 rebase [rhel-9.8.z] (JIRA:Rocky Linux-175199)\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": "0:153.5.0-1.el9_8"}], "database_specific": {"yum_repository": "AppStream"}}]}], "references": [{"type": "ADVISORY", "url": "https://errata.rockylinux.org/RLSA-2026:93443"}, {"type": "REPORT", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2468575"}, {"type": "REPORT", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2550393"}, 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