TH
Product
Thunderbird
by Mozilla · last CVE Sep 30, 2026
On CISA KEVExploited in the wildRansomware-linked
2,073
CVEs
14
On KEV
10.0
Max CVSS
77
New 30D
Severity mix
Critical 379High 120Medium 1Low 0
Watch

Add Thunderbird to your stack to get only the CVEs that touch what you run.

CVECVSSEPSSPublishedSummary · affected versions
CVE-2026-74943
9.8
1%
Aug 18
Use-after-free in the Graphics: ImageLib component
Affected: before 140.14.0; 141.0 before 153.1.0
CVE-2026-74940
9.8
1%
Aug 18
Use-after-free in the Graphics: Text component
Affected: before 140.14.0; 141.0 before 153.1.0
CVE-2026-74936
9.8
1%
Aug 18
Use-after-free in the JavaScript: WebAssembly component
Affected: before 140.14.0; 141.0 before 153.1.0
CVE-2026-16361
9.8
1%
Jul 21
Memory safety bugs fixed in Thunderbird ESR 140.13
Affected: before 140.13.0
CVE-2026-16360
9.8
1%
Jul 21
Memory safety bugs fixed in Thunderbird ESR 140.13 and Thunderbird 153
Affected: before 140.13.0; 141.0 before 153.0
CVE-2026-16410
9.8
1%
Jul 21
JIT miscompilation in the JavaScript Engine: JIT component
Affected: before 153.0
CVE-2026-16407
9.8
1%
Jul 21
Mitigation bypass in the DOM: Service Workers component
Affected: before 153.0
CVE-2026-16402
9.8
1%
Jul 21
Integer overflow in the Graphics: ImageLib component
Affected: before 153.0
CVE-2026-16389
9.8
1%
Jul 21
Incorrect boundary conditions, integer overflow in the Libraries component in NSS
Affected: before 153.0
CVE-2026-16388
9.8
1%
Jul 21
Sandbox escape in the DOM: Networking component
Affected: before 153.0
CVE-2026-16387
9.8
0%
Jul 21
Site isolation issue in the Networking component
Affected: before 140.13.0; 141.0 before 153.0
CVE-2026-16383
9.8
1%
Jul 21
Mitigation bypass in the DOM: Networking component
Affected: before 140.13.0; 141.0 before 153.0
CVE-2026-16382
9.8
1%
Jul 21
Mitigation bypass in the DOM: Service Workers component
Affected: before 153.0
CVE-2026-16358
9.8
0%
Jul 21
Site isolation issue in the Graphics: WebRender component
Affected: before 140.13.0; 141.0 before 153.0
CVE-2026-16377
9.8
1%
Jul 21
Mitigation bypass in the PDF Viewer component
Affected: before 140.13.0; 141.0 before 153.0
CVE-2026-16375
9.8
0%
Jul 21
Site isolation issue in the Networking: HTTP component
Affected: before 140.13.0; 141.0 before 153.0
CVE-2026-16357
9.8
1%
Jul 21
Incorrect boundary conditions in the Graphics component
Affected: before 140.13.0; 141.0 before 153.0
CVE-2026-16356
9.8
1%
Jul 21
Sandbox escape due to use-after-free in the Disability Access APIs component
Affected: before 140.13.0; 141.0 before 153.0
CVE-2026-16355
9.8
1%
Jul 21
JIT miscompilation in the JavaScript Engine: JIT component
Affected: before 140.13.0; 141.0 before 153.0
CVE-2026-16369
9.8
1%
Jul 21
Integer overflow in the JavaScript: WebAssembly component
Affected: before 140.13.0; 141.0 before 153.0
CVE-2026-16368
9.8
1%
Jul 21
Incorrect boundary conditions in the JavaScript: WebAssembly component
Affected: before 140.13.0; 141.0 before 153.0
CVE-2026-16353
9.8
1%
Jul 21
Invalid pointer in the DOM: Bindings (WebIDL) component
Affected: before 140.13.0; 141.0 before 153.0
CVE-2026-16363
9.8
1%
Jul 21
JIT miscompilation in the JavaScript: WebAssembly component
Affected: before 140.13.0; 141.0 before 153.0
CVE-2026-16352
9.8
1%
Jul 21
Sandbox escape due to use-after-free in the Disability Access APIs component
Affected: before 140.13.0; 141.0 before 153.0
CVE-2026-16351
9.8
1%
Jul 21
Sandbox escape due to use-after-free in the DOM: Navigation component
Affected: before 140.13.0; 141.0 before 153.0
CVE-2026-16350
9.8
1%
Jul 21
Incorrect boundary conditions in the Audio/Video: cubeb component
Affected: before 140.13.0; 141.0 before 153.0
CVE-2026-16349
9.8
0%
Jul 21
Same-origin policy bypass in the DOM: Navigation component
Affected: before 140.13.0; 141.0 before 153.0
CVE-2026-12293
9.8
0%
Jun 16
Use-after-free in the Graphics: WebGPU component
Affected: before 152.0.0
CVE-2026-8956
9.8
1%
May 19
Integer overflow in the Networking: JAR component
Affected: before 140.11; before 151.0.0
CVE-2026-8094
9.8
0%
May 7
Other issue in the WebRTC component
Affected: before 140.10.2
CVE-2026-8091
9.8
0%
May 7
Incorrect boundary conditions in the Audio/Video: Playback component
Affected: 140.0 before 140.10.1
CVE-2026-6771
9.8
0%
Apr 21
Mitigation bypass in the DOM: Security component
Affected: 140.0 before 140.10.0
CVE-2026-6768
9.8
0%
Apr 21
Mitigation bypass in the Networking: Cookies component
Affected: before 150.0
CVE-2026-6760
9.8
0%
Apr 21
Mitigation bypass in the Networking: Cookies component
Affected: before 150.0
CVE-2026-6748
9.8
0%
Apr 21
Uninitialized memory in the Audio/Video: Web Codecs component
Affected: before 140.10.0
CVE-2026-5735
9.8
0%
Apr 7
Memory safety bugs fixed in Firefox 149.0.2 and Thunderbird 149.0.2
Affected: before 149.0.2
CVE-2026-5734
9.8
0%
Apr 7
Memory safety bugs fixed in Firefox ESR 140.9.1, Thunderbird ESR 140.9.1, Firefox 149.0.2 and Thunderbird 149.0.2
Affected: before 140.9.1; before 149.0.2
CVE-2026-5731
9.8
0%
Apr 7
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
Affected: 140.9.0; 149.0.1
CVE-2026-4729
9.8
0%
Mar 24
Memory safety bugs present in Firefox 148 and Thunderbird 148
Affected: before 149.0
CVE-2026-4721
9.8
0%
Mar 24
Memory safety bugs present in Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird ESR 140.8, Firefox 148 and Thunderbird 148
Affected: before 140.9.0; before 149.0
CVE-2026-4720
9.8
0%
Mar 24
Memory safety bugs present in Firefox ESR 140.8, Thunderbird ESR 140.8, Firefox 148 and Thunderbird 148
Affected: before 140.9.0; before 149.0
CVE-2026-4710
9.8
0%
Mar 24
Incorrect boundary conditions in the Audio/Video component
Affected: before 140.9.0; before 149.0
CVE-2026-2807
9.8
0%
Feb 24
Memory safety bugs present in Firefox 147 and Thunderbird 147
Affected: before 148.0
CVE-2026-2805
9.8
1%
Feb 24
Invalid pointer in the DOM: Core & HTML component
Affected: before 148.0
CVE-2026-2800
9.8
0%
Feb 24
Spoofing issue in the WebAuthn component in Firefox for Android
Affected: before 148.0
CVE-2026-2799
9.8
1%
Feb 24
Use-after-free in the DOM: Core & HTML component
Affected: before 148.0
CVE-2026-2797
9.8
1%
Feb 24
Use-after-free in the JavaScript: GC component
Affected: before 148.0
CVE-2026-2796
9.8
1%
Feb 24
JIT miscompilation in the JavaScript: WebAssembly component
Affected: before 148.0
CVE-2026-2795
9.8
0%
Feb 24
Use-after-free in the JavaScript: GC component
Affected: before 148.0
CVE-2026-2793
9.8
0%
Feb 24
Memory safety bugs present in Firefox ESR 115.32, Firefox ESR 140.7, Thunderbird ESR 140.7, Firefox 147 and Thunderbird 147
Affected: before 140.8.0; before 148.0
Page 2 of 10 · 500 total
The 500 most important CVEs for this product (exploited first, then by severity)