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

CVECVSSEPSSPublishedSummary · affected versions
CVE-2026-2781
9.8
0%
Feb 24
Integer overflow in the Libraries component in NSS
Affected: before 140.8.0; before 148.0
CVE-2026-2780
9.8
0%
Feb 24
Privilege escalation in the Netmonitor component
Affected: before 140.8.0; before 148.0
CVE-2026-2779
9.8
1%
Feb 24
Incorrect boundary conditions in the Networking: JAR component
Affected: before 140.8.0; before 148.0
CVE-2026-2777
9.8
0%
Feb 24
Privilege escalation in the Messaging System component
Affected: before 140.8.0; before 148.0
CVE-2026-2775
9.8
1%
Feb 24
Mitigation bypass in the DOM: HTML Parser component
Affected: before 140.8.0; before 148.0
CVE-2026-2774
9.8
1%
Feb 24
Integer overflow in the Audio/Video component
Affected: before 140.8.0; before 148.0
CVE-2026-2773
9.8
1%
Feb 24
Incorrect boundary conditions in the Web Audio component
Affected: before 140.8.0; before 148.0
CVE-2026-2772
9.8
1%
Feb 24
Use-after-free in the Audio/Video: Playback component
Affected: before 140.8.0; before 148.0
CVE-2026-2771
9.8
1%
Feb 24
Undefined behavior in the DOM: Core & HTML component
Affected: before 140.8.0; before 148.0
CVE-2026-2770
9.8
1%
Feb 24
Use-after-free in the DOM: Bindings (WebIDL) component
Affected: before 140.8.0; before 148.0
CVE-2026-2767
9.8
0%
Feb 24
Use-after-free in the JavaScript: WebAssembly component
Affected: before 140.8.0; before 148.0
CVE-2026-2766
9.8
1%
Feb 24
Use-after-free in the JavaScript Engine: JIT component
Affected: before 140.8.0; before 148.0
CVE-2026-2765
9.8
1%
Feb 24
Use-after-free in the JavaScript Engine component
Affected: before 140.8.0; before 148.0
CVE-2026-2764
9.8
1%
Feb 24
JIT miscompilation, use-after-free in the JavaScript Engine: JIT component
Affected: before 140.8.0; before 148.0
CVE-2026-2763
9.8
1%
Feb 24
Use-after-free in the JavaScript Engine component
Affected: before 140.8.0; before 148.0
CVE-2026-2762
9.8
1%
Feb 24
Integer overflow in the JavaScript: Standard Library component
Affected: before 140.8.0; before 148.0
CVE-2026-2759
9.8
0%
Feb 24
Incorrect boundary conditions in the Graphics: ImageLib component
Affected: before 140.8.0; before 148.0
CVE-2026-2758
9.8
1%
Feb 24
Use-after-free in the JavaScript: GC component
Affected: before 140.8.0; before 148.0
CVE-2026-2757
9.8
1%
Feb 24
Incorrect boundary conditions in the WebRTC: Audio/Video component
Affected: before 140.8.0; before 148.0
CVE-2026-0892
9.8
0%
Jan 13
Memory safety bugs fixed in Firefox 147 and Thunderbird 147
Affected: before 147.0
CVE-2026-0884
9.8
0%
Jan 13
Use-after-free in the JavaScript Engine component
Affected: before 140.7.0; before 147.0
CVE-2026-0879
9.8
0%
Jan 13
Sandbox escape due to incorrect boundary conditions in the Graphics component
Affected: before 140.7.0; before 147.0
CVE-2025-14330
9.8
1%
Dec 9
JIT miscompilation in the JavaScript Engine: JIT component
Affected: before 140.6.0; before 146.0
CVE-2025-14326
9.8
0%
Dec 9
Use-after-free in the Audio/Video: GMP component
Affected: before 146.0
CVE-2025-14324
9.8
1%
Dec 9
JIT miscompilation in the JavaScript Engine: JIT component
Affected: before 140.6.0; before 146.0
CVE-2025-14321
9.8
1%
Dec 9
Use-after-free in the WebRTC: Signaling component
Affected: before 140.6.0; before 146.0
CVE-2025-11721
9.8
0%
Oct 14
Memory safety bug fixed in Firefox 144 and Thunderbird 144
Affected: 143.0 before 144.0
CVE-2025-11719
9.8
0%
Oct 14
Use-after-free caused by the native messaging web extension API on Windows
Affected: 143.0 before 144.0
CVE-2025-11708
9.8
1%
Oct 14
Use-after-free in MediaTrackGraphImpl::GetInstance()
Affected: before 140.4.0; 141.0 before 144.0
CVE-2025-11710
9.8
0%
Oct 14
Cross-process information leaked due to malicious IPC messages
Affected: before 140.4.0; 141.0 before 144.0
CVE-2025-11709
9.8
0%
Oct 14
Out of bounds read/write in a privileged process triggered by WebGL textures
Affected: before 144.0
CVE-2025-9187
9.8
0%
Aug 19
Memory safety bugs present in Firefox 141 and Thunderbird 141
Affected: before 142.0
CVE-2025-9179
9.8
1%
Aug 19
An attacker was able to perform memory corruption in the GMP process which processes encrypted media
Affected: before 128.14.0; before 142.0; 140.0 before 140.2.0
CVE-2025-8044
9.8
0%
Jul 22
Memory safety bugs present in Firefox 140 and Thunderbird 140
Affected: before 141.0
CVE-2025-8043
9.8
0%
Jul 22
Focus incorrectly truncated URLs towards the beginning instead of around the origin
Affected: before 141.0
CVE-2025-8038
9.8
0%
Jul 22
Thunderbird ignored paths when checking the validity of navigations in a frame
Affected: before 140.1.0; before 141.0
CVE-2025-8031
9.8
1%
Jul 22
The `username:password` part was not correctly stripped from URLs in CSP reports potentially leaking HTTP Basic Authentication credentials
Affected: before 128.13.0; before 141.0; 140.0 before 140.1.0
CVE-2025-8028
9.8
1%
Jul 22
On arm64, a WASM `br_table` instruction with a lot of entries could lead to the label being too far from the instruction causing truncation and incorrect computation of the branch…
Affected: before 128.13.0; before 141.0; 140.0 before 140.1.0
CVE-2025-4918
9.8
10%
May 17
An attacker was able to perform an out-of-bounds read or write on a JavaScript `Promise` object
Affected: before 128.10.2; 138.0 before 138.0.2
CVE-2025-1942
9.8
0%
Mar 4
When String.toUpperCase() caused a string to get longer it was possible for uninitialized memory to be incorporated into the result string
Affected: before 136.0
CVE-2025-1020
9.8
1%
Feb 4
Memory safety bugs present in Firefox 134 and Thunderbird 134
Affected: 131.0 before 135.0
CVE-2025-1017
9.8
1%
Feb 4
Memory safety bugs present in Firefox 134, Thunderbird 134, Firefox ESR 128.6, and Thunderbird 128.6
Affected: 128.0.1 before 128.7.0; 131.0 before 135.0
CVE-2025-1016
9.8
1%
Feb 4
Memory safety bugs present in Firefox 134, Thunderbird 134, Firefox ESR 115.19, Firefox ESR 128.6, Thunderbird 115.19, and Thunderbird 128.6
Affected: 128.0.1 before 128.7.0; 131.0 before 135.0
CVE-2025-1009
9.8
1%
Feb 4
An attacker could have caused a use-after-free via crafted XSLT data, leading to a potentially exploitable crash
Affected: 128.0.1 before 128.7.0; 131.0 before 135.0
CVE-2025-0247
9.8
11%
Jan 7
Memory safety bugs fixed in Firefox 134 and Thunderbird 134
Affected: before 134.0
CVE-2024-11704
9.8
1%
Nov 26
A double-free issue could have occurred in `sec_pkcs7_decoder_start_decrypt()` when handling an error path
Affected: before 128.7.0; 129.0 before 133.0
CVE-2024-11698
9.8
1%
Nov 26
A flaw in handling fullscreen transitions may have inadvertently caused the application to become stuck in fullscreen mode when a modal dialog was opened during the transition
Affected: before 128.5.0; 129.0 before 133.0
CVE-2024-11693
9.8
1%
Nov 26
The executable file warning was not presented when downloading .library-ms files
Affected: before 128.5.0; 129.0 before 133.0
CVE-2024-9402
9.8
1%
Oct 1
Memory safety bugs present in Firefox 130, Firefox ESR 128.2, and Thunderbird 128.2
Affected: before 128.3.0; 129.0 before 131.0
CVE-2024-9401
9.8
1%
Oct 1
Memory safety bugs present in Firefox 130, Firefox ESR 115.15, Firefox ESR 128.2, and Thunderbird 128.2
Affected: before 128.3.0; 129.0 before 131.0
Page 3 of 8 · 379 total
The 500 most important CVEs for this product (exploited first, then by severity)