Mozilla: >> Thunderbird >> 153.4.0 Security Vulnerabilities
Other issue in the DevTools component. This vulnerability was fixed in Thunderbird 157 and Firefox 157.
CVSS Score
9.8
EPSS Score
0.004
Published
2026-09-29
Invalid pointer in the JavaScript Engine: JIT component. This vulnerability was fixed in Thunderbird 157 and Firefox 157.
CVSS Score
8.8
EPSS Score
0.002
Published
2026-09-29
Other issue in the JavaScript: WebAssembly component. This vulnerability was fixed in Thunderbird 157 and Firefox 157.
CVSS Score
5.4
EPSS Score
0.002
Published
2026-09-29
Uninitialized memory in the Graphics: WebGPU component. This vulnerability was fixed in Thunderbird 157 and Firefox 157.
CVSS Score
4.3
EPSS Score
0.002
Published
2026-09-29
Sandbox escape due to use-after-free in the Preferences: Backend component. This vulnerability was fixed in Thunderbird 157 and Firefox 157.
CVSS Score
9.6
EPSS Score
0.003
Published
2026-09-29
Race condition, use-after-free in the Audio/Video component. This vulnerability was fixed in Thunderbird 157 and Firefox 157.
CVSS Score
7.5
EPSS Score
0.002
Published
2026-09-29
JIT miscompilation in the JavaScript Engine component. This vulnerability was fixed in Thunderbird 157 and Firefox 157.
CVSS Score
6.5
EPSS Score
0.003
Published
2026-09-29
Denial-of-service in the Networking component. This vulnerability was fixed in Thunderbird 157 and Firefox 157.
CVSS Score
6.5
EPSS Score
0.003
Published
2026-09-29
Use-after-free in the JavaScript: WebAssembly component. This vulnerability was fixed in Thunderbird 157 and Firefox 157.
CVSS Score
8.8
EPSS Score
0.003
Published
2026-09-29
Uninitialized memory in the Graphics: WebGPU component. This vulnerability was fixed in Thunderbird 157 and Firefox 157.
CVSS Score
4.3
EPSS Score
0.002
Published
2026-09-29
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