Security Vulnerabilities
Spoofing issue in the Networking: HTTP component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157.
CVSS Score
5.4
EPSS Score
0.002
Published
2026-09-29
Privilege escalation in the Places component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157.
CVSS Score
8.8
EPSS Score
0.002
Published
2026-09-29
Use-after-free in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157.
CVSS Score
8.8
EPSS Score
0.002
Published
2026-09-29
Denial-of-service in the Storage: StorageManager component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157.
CVSS Score
6.5
EPSS Score
0.002
Published
2026-09-29
Same-origin policy bypass in the DevTools component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157.
CVSS Score
8.1
EPSS Score
0.002
Published
2026-09-29
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
Sandbox escape due to use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, and Firefox ESR 140.17.
CVSS Score
9.6
EPSS Score
0.003
Published
2026-09-29
Denial-of-service in the Graphics component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157.
CVSS Score
6.5
EPSS Score
0.003
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
Incorrect boundary conditions in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157.
CVSS Score
8.8
EPSS Score
0.002
Published
2026-09-29