Mozilla Thunderbird is a standalone mail and newsgroup client.
Security Fix(es):
* firefox: thunderbird: Use-after-free in the Graphics: Canvas2D component (CVE-2026-100832)
* firefox: Use-after-free in the Layout: Text and Fonts component (CVE-2026-100784)
* firefox: thunderbird: Privilege escalation in the DLL Services component (CVE-2026-100801)
* firefox: thunderbird: Sandbox escape due to incorrect boundary conditions in the Internationalization component (CVE-2026-100794)
* firefox: thunderbird: Privilege escalation in the Address Bar component (CVE-2026-100820)
* firefox: thunderbird: Use-after-free in the Graphics: Canvas2D com
Mozilla Thunderbird is a standalone mail and newsgroup client.
Security Fix(es):
* firefox: thunderbird: Privilege escalation in the DOM: Workers component (CVE-2026-16365)
* firefox: thunderbird: Sandbox escape in the Remote Settings Client component (CVE-2026-75874)
* firefox: Sandbox escape due to use-after-free in the DOM: Security component (CVE-2026-84121)
* firefox: Internally found bugs fixed in Firefox 155, Firefox ESR 153.2, Firefox ESR 140.15 and Firefox ESR 115.40 (CVE-2026-84145)
* firefox: Sandbox escape due to use-after-free in the DOM: Navigation component (CVE-2026-84119)
* firefox: Use-after-free in the Audio/Video co
Mozilla Thunderbird is a standalone mail and newsgroup client.
Security Fix(es):
* firefox: thunderbird: Site isolation issue in the Graphics: CanvasWebGL component (CVE-2026-74934)
* firefox: thunderbird: Internally found bugs fixed in Firefox ESR 140.14, Firefox ESR 153.1 and Firefox 154 (CVE-2026-74987)
* firefox: thunderbird: Use-after-free in the Graphics: ImageLib component (CVE-2026-74943)
* firefox: thunderbird: Information disclosure in the DOM: UI Events & Focus Handling component (CVE-2026-74971)
* firefox: Privilege escalation in the Shell Integration component (CVE-2026-74965)
* firefox: thunderbird: Privilege escalation d
Mozilla Thunderbird is a standalone mail and newsgroup client.
Security Fix(es):
* firefox: thunderbird: Site isolation issue in the DOM: Navigation component (CVE-2026-15719)
* firefox: thunderbird: Invalid pointer in the JavaScript: WebAssembly component (CVE-2026-15718)
* firefox: thunderbird: Mitigation bypass in the Enterprise Policies component (CVE-2026-16390)
* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: cubeb component (CVE-2026-16350)
* firefox: thunderbird: Information disclosure in the Storage: IndexedDB component (CVE-2026-16391)
* firefox: thunderbird: Site isolation issue in the Networking: HT
Mozilla Thunderbird is a standalone mail and newsgroup client.
Security Fix(es):
* firefox: thunderbird: Sandbox escape in the DOM: Workers component (CVE-2026-12294)
* firefox: thunderbird: Information disclosure, sandbox escape in the Security: Process Sandboxing component (CVE-2026-12313)
* firefox: thunderbird: Information disclosure, sandbox escape in the Security: Process Sandboxing component (CVE-2026-12311)
* firefox: thunderbird: Memory safety bug fixed in Thunderbird ESR 140.12 (CVE-2026-12290)
* firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.12, Thunderbird ESR 140.12, Firefox 152 and Thunderbird 152 (CVE-2
Mozilla Thunderbird is a standalone mail and newsgroup client.
Security Fix(es):
* firefox: Incorrect boundary conditions in the JavaScript Engine: JIT component (CVE-2026-8388)
* firefox: Other issue in the JavaScript Engine component (CVE-2026-8391)
* firefox: Sandbox escape in the Profile Backup component (CVE-2026-8401)
* firefox: Integer overflow in the Networking: JAR component (CVE-2026-8956)
* firefox: Memory safety bugs fixed in Firefox ESR 115.36, Firefox ESR 140.11 and Firefox 151 (CVE-2026-8975)
* firefox: Privilege escalation in the DOM: Workers component (CVE-2026-8955)
* firefox: Denial-of-service due to invalid pointer
Mozilla Thunderbird is a standalone mail and newsgroup client.
Security Fix(es):
* firefox: thunderbird: Incorrect boundary conditions in the Libraries component in NSS (CVE-2026-6772)
* firefox: thunderbird: Use-after-free in the JavaScript Engine component (CVE-2026-6754)
* firefox: thunderbird: Spoofing issue in the DOM: Core & HTML component (CVE-2026-6762)
* firefox: thunderbird: Incorrect boundary conditions in the WebRTC component (CVE-2026-6752)
* firefox: thunderbird: Other issue in the Storage: IndexedDB component (CVE-2026-6770)
* firefox: thunderbird: Invalid pointer in the JavaScript: WebAssembly component (CVE-2026-6757)
Mozilla Thunderbird is a standalone mail and newsgroup client.
Security Fix(es):
* firefox: thunderbird: Incorrect boundary conditions in the Libraries component in NSS (CVE-2026-6772)
* firefox: thunderbird: Use-after-free in the JavaScript Engine component (CVE-2026-6754)
* firefox: thunderbird: Spoofing issue in the DOM: Core & HTML component (CVE-2026-6762)
* firefox: thunderbird: Incorrect boundary conditions in the WebRTC component (CVE-2026-6752)
* firefox: thunderbird: Other issue in the Storage: IndexedDB component (CVE-2026-6770)
* firefox: thunderbird: Invalid pointer in the JavaScript: WebAssembly component (CVE-2026-6757)
Mozilla Thunderbird is a standalone mail and newsgroup client.
Security Fix(es):
* libpng: libpng: Arbitrary code execution due to use-after-free vulnerability (CVE-2026-33416)
* libpng: libpng: Information disclosure and denial of service via out-of-bounds read/write in Neon palette expansion (CVE-2026-33636)
* thunderbird: firefox: Memory safety bugs fixed in Firefox ESR 140.9.1, Thunderbird ESR 140.9.1, Firefox 149.0.2 and Thunderbird 149.0.2 (CVE-2026-5734)
* thunderbird: firefox: Memory safety bugs fixed in Firefox ESR 115.34.1, Firefox ESR 140.9.1, Thunderbird ESR 140.9.1, Firefox 149.0.2 and Thunderbird 149.0.2 (CVE-2026-5731)
*
Mozilla Thunderbird is a standalone mail and newsgroup client.
Security Fix(es):
* firefox: thunderbird: Use-after-free in the JavaScript Engine component (CVE-2026-4701)
* firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149 and Thunderbird 149 (CVE-2026-4721)
* firefox: thunderbird: Privilege escalation in the Netmonitor component (CVE-2026-4717)
* firefox: thunderbird: Sandbox escape due to use-after-free in the Disability Access APIs component (CVE-2026-4688)
* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4706)
Mozilla Thunderbird is a standalone mail and newsgroup client.
Security Fix(es):
* libvpx: Heap buffer overflow in libvpx (CVE-2026-2447)
* firefox: Invalid pointer in the JavaScript Engine component (CVE-2026-2785)
* firefox: Memory safety bugs fixed in Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird ESR 140.8, Firefox 148 and Thunderbird 148 (CVE-2026-2793)
* firefox: Undefined behavior in the DOM: Core & HTML component (CVE-2026-2771)
* firefox: Integer overflow in the Audio/Video component (CVE-2026-2774)
* firefox: Sandbox escape due to incorrect boundary conditions in the Telemetry component in External Software (CVE-2026-2776
Mozilla Thunderbird is a standalone mail and newsgroup client.
Security Fix(es):
* firefox: Spoofing issue in the Downloads Panel component (CVE-2025-14327)
* firefox: Use-after-free in the JavaScript: GC component (CVE-2026-0885)
* firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.7, Thunderbird ESR 140.7, Firefox 147 and Thunderbird 147 (CVE-2026-0891)
* firefox: Sandbox escape due to incorrect boundary conditions in the Graphics: CanvasWebGL component (CVE-2026-0878)
* firefox: Use-after-free in the IPC component (CVE-2026-0882)
* firefox: Use-after-free in the JavaScript Engine component (CVE-2026-0884)
* firefox:
Mozilla Thunderbird is a standalone mail and newsgroup client.
Security Fix(es):
* firefox: Memory safety bugs fixed in Firefox ESR 140.6, Thunderbird ESR 140.6, Firefox 146 and Thunderbird 146 (CVE-2025-14333)
* firefox: Use-after-free in the WebRTC: Signaling component (CVE-2025-14321)
* firefox: JIT miscompilation in the JavaScript Engine: JIT component (CVE-2025-14325)
* firefox: Sandbox escape due to incorrect boundary conditions in the Graphics: CanvasWebGL component (CVE-2025-14322)
* firefox: Privilege escalation in the Netmonitor component (CVE-2025-14328)
* firefox: Privilege escalation in the Netmonitor component (CVE-2025-1
Mozilla Thunderbird is a standalone mail and newsgroup client.
Security Fix(es):
* thunderbird: firefox: Memory safety bugs (CVE-2025-11714)
* thunderbird: firefox: Out of bounds read/write in a privileged process triggered by WebGL textures (CVE-2025-11709)
* thunderbird: firefox: Cross-process information leaked due to malicious IPC messages (CVE-2025-11710)
* thunderbird: firefox: Use-after-free in MediaTrackGraphImpl::GetInstance() (CVE-2025-11708)
* thunderbird: firefox: An OBJECT tag type attribute overrode browser behavior on web resources without a content-type (CVE-2025-11712)
* thunderbird: firefox: Memory safety bugs fixed i
Mozilla Thunderbird is a standalone mail and newsgroup client.
Security Fix(es):
* firefox: thunderbird: Sandbox escape due to use-after-free in the Graphics: Canvas2D component (CVE-2025-10527)
* firefox: thunderbird: Incorrect boundary conditions in the JavaScript: GC component (CVE-2025-10532)
* firefox: thunderbird: Sandbox escape due to undefined behavior, invalid pointer in the Graphics: Canvas2D component (CVE-2025-10528)
* firefox: thunderbird: Same-origin policy bypass in the Layout component (CVE-2025-10529)
* firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.3, Thunderbird ESR 140.3, Firefox 143 and Thunderbir
Mozilla Thunderbird is a standalone mail and newsgroup client.
Security Fix(es):
* firefox: thunderbird: Out-of-bounds access when resolving Promise objects (CVE-2025-4918)
* firefox: thunderbird: Out-of-bounds access when optimizing linear sums (CVE-2025-4919)
* firefox: thunderbird: Clickjacking vulnerability could have led to leaking saved payment card details (CVE-2025-5267)
* firefox: thunderbird: Potential local code execution in ?Copy as cURL? command (CVE-2025-5264)
* firefox: thunderbird: Memory safety bugs (CVE-2025-5268)
* firefox: thunderbird: Script element events leaked cross-origin resource status (CVE-2025-5266)
* fire
Mozilla Thunderbird is a standalone mail and newsgroup client.
Security Fix(es):
* thunderbird: JavaScript Execution via Spoofed PDF Attachment and file:/// Link (CVE-2025-3909)
* thunderbird: Sender Spoofing via Malformed From Header in Thunderbird (CVE-2025-3875)
* thunderbird: Unsolicited File Download, Disk Space Exhaustion, and Credential Leakage via mailbox:/// Links (CVE-2025-3877)
* thunderbird: Tracking Links in Attachments Bypassed Remote Content Blocking (CVE-2025-3932)
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) lis
Mozilla Thunderbird is a standalone mail and newsgroup client.
Security Fix(es):
* firefox: thunderbird: Large branch table could lead to truncated instruction (CVE-2025-8028)
* firefox: thunderbird: Memory safety bugs (CVE-2025-8035)
* firefox: thunderbird: Incorrect URL stripping in CSP reports (CVE-2025-8031)
* firefox: thunderbird: JavaScript engine only wrote partial return value to stack (CVE-2025-8027)
* firefox: thunderbird: Potential user-assisted code execution in ?Copy as cURL? command (CVE-2025-8030)
* firefox: Memory safety bugs (CVE-2025-8034)
* firefox: thunderbird: Incorrect JavaScript state machine for generators (CVE
Mozilla Thunderbird is a standalone mail and newsgroup client.
Security Fix(es):
* thunderbird: Unsolicited File Download, Disk Space Exhaustion, and Credential Leakage via mailbox:/// Links (CVE-2025-5986)
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.
Mozilla Thunderbird is a standalone mail and newsgroup client.
Security Fix(es):
* thunderbird: User Interface (UI) Misrepresentation of attachment URL (CVE-2025-3523)
* thunderbird: Information Disclosure of /tmp directory listing (CVE-2025-2830)
* thunderbird: Leak of hashed Window credentials via crafted attachment URL (CVE-2025-3522)
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.