ALSA-2026:93443

Mozilla Thunderbird is a standalone mail and newsgroup client.

Security Fix(es):

• libexpat: denial of service via crafted XML input (CVE-2026-45186)
• firefox: Mitigation bypass in the Enterprise Policies component (CVE-2026-109764)
• firefox: Spoofing issue in the DOM: Web Serial component (CVE-2026-109770)
• firefox: Mitigation bypass in the File Handling component (CVE-2026-109783)
• firefox: thunderbird: Privilege escalation in the Application Update component (CVE-2026-109704)
• firefox: Use-after-free in the XML component (CVE-2026-109718)
• firefox: Information disclosure in the PDF Viewer component (CVE-2026-109742)
• firefox: Incorrect boundary conditions in the JavaScript Engine component (CVE-2026-109715)
• firefox: firefox: Sandbox escape via incorrect boundary conditions in Win32 widget (CVE-2026-109740)
• firefox: Use-after-free in the Storage: IndexedDB component (CVE-2026-109706)
• firefox: Use-after-free in the Crash Reporting component (CVE-2026-109713)
• firefox: Use-after-free in the DOM: Core & HTML component (CVE-2026-109724)
• firefox: Sandbox escape due to uninitialized memory in the DOM: Web Serial component (CVE-2026-109745)
• firefox: Mitigation bypass in the File Handling component (CVE-2026-109782)
• firefox: Information disclosure, privilege escalation in the Security: Process Sandboxing component (CVE-2026-109709)
• firefox: Sandbox escape, site isolation issue due to incorrect boundary conditions, use-after-free in the Networking component (CVE-2026-109705)
• firefox: Use-after-free in the Audio/Video: Playback component (CVE-2026-109738)
• firefox: Sandbox escape due to race condition in the Networking component (CVE-2026-109757)
• firefox: Use-after-free in the Storage: Bucket File System component (CVE-2026-109741)
• firefox: Use-after-free in the JavaScript Engine: JIT component (CVE-2026-109729)
• firefox: Other issue in the DOM: File component (CVE-2026-109744)
• firefox: Incorrect boundary conditions in the JavaScript Engine component (CVE-2026-109716)
• firefox: Race condition, use-after-free in the Graphics: CanvasWebGL component (CVE-2026-109719)
• firefox: Incorrect boundary conditions in the Layout component (CVE-2026-109753)
• firefox: Integer overflow in the Layout: Text and Fonts component (CVE-2026-109723)
• firefox: Privilege escalation in the DOM: Navigation component (CVE-2026-109756)
• firefox: JIT miscompilation in the JavaScript Engine: JIT component (CVE-2026-109733)
• firefox: thunderbird: Mitigation bypass in the DOM: Security component (CVE-2026-109734)
• firefox: Mitigation bypass in the File Handling component (CVE-2026-109763)
• firefox: Sandbox escape due to incorrect boundary conditions in the Networking component (CVE-2026-109708)
• firefox: Use-after-free in the DOM: Bindings (WebIDL) component (CVE-2026-109717)
• firefox: Use-after-free in the DOM: Workers component (CVE-2026-109752)
• firefox: Race condition in the XPCOM component (CVE-2026-109776)
• firefox: Sandbox escape due to use-after-free in the Networking component (CVE-2026-109707)
• firefox: Mitigation bypass in the Networking: HTTP component (CVE-2026-109760)
• firefox: JIT miscompilation in the JavaScript: WebAssembly component (CVE-2026-109720)
• firefox: Information disclosure in the Storage: IndexedDB component (CVE-2026-109777)
• firefox: Use-after-free in the SVG component (CVE-2026-109726)
• firefox: Integer overflow in the Graphics component (CVE-2026-109730)
• firefox: Use-after-free in the Audio/Video component (CVE-2026-109727)
• firefox: Mitigation bypass in the Enterprise Policies component (CVE-2026-109737)
• firefox: Mitigation bypass in the Enterprise Policies component (CVE-2026-109766)
• firefox: Use-after-free in the DOM: Streams component (CVE-2026-109732)
• firefox: Site isolation issue in the Networking component (CVE-2026-109759)
• firefox: Privilege escalation in the WebExtensions component (CVE-2026-109778)
• firefox: Incorrect boundary conditions in the SVG component (CVE-2026-109762)
• firefox: Race condition, use-after-free in the Graphics: Text component (CVE-2026-109765)
• firefox: Incorrect boundary conditions in the DOM: Editor component (CVE-2026-109754)
• firefox: Information disclosure in the Networking component (CVE-2026-109751)
• firefox: Use-after-free in the DOM: Core & HTML component (CVE-2026-109725)
• firefox: Sandbox escape due to uninitialized memory in the Graphics component (CVE-2026-109712)
• firefox: Use-after-free in the Graphics: Canvas2D component (CVE-2026-109711)
• firefox: Frame poisoning in the Layout component (CVE-2026-109736)
• firefox: JIT miscompilation in the JavaScript Engine: JIT component (CVE-2026-109722)
• firefox: Information disclosure in the Networking component (CVE-2026-109767)
• firefox: Denial-of-service in the WebRTC component (CVE-2026-109775)
• firefox: Use-after-free in the DOM: Animation component (CVE-2026-109728)
• firefox: Denial-of-service in the Printing: Output component (CVE-2026-109781)
• firefox: thunderbird: Use-after-free in the Graphics: Text component (CVE-2026-109710)
• firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-109731)
• firefox: Incorrect boundary conditions in the JavaScript Engine: JIT component (CVE-2026-109721)
• firefox: Privilege escalation in the Panning and Zooming component (CVE-2026-109743)

Bug Fix(es) and Enhancement(s):

• Thunderbird ESR 153 rebase [rhel-9.8.z] (JIRA:RHEL-175199)

For 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.