Mozilla: >> Firefox >> 127.0 Security Vulnerabilities
Use-after-free in the JavaScript Engine component. This vulnerability affects Firefox < 148, Firefox ESR < 140.8, Thunderbird < 148, and Thunderbird < 140.8.
CVSS Score
9.8
EPSS Score
0.001
Published
2026-02-24
Use-after-free in the JavaScript Engine: JIT component. This vulnerability affects Firefox < 148, Firefox ESR < 140.8, Thunderbird < 148, and Thunderbird < 140.8.
CVSS Score
9.8
EPSS Score
0.001
Published
2026-02-24
Malicious scripts could cause desynchronization between the address bar and web content before a response is received in Firefox iOS, allowing attacker-controlled pages to be presented under spoofed domains. This vulnerability affects Firefox for iOS < 147.4.
CVSS Score
9.8
EPSS Score
0.001
Published
2026-02-24
Incorrect boundary conditions in the WebRTC: Audio/Video component. This vulnerability affects Firefox < 148, Firefox ESR < 115.33, Firefox ESR < 140.8, Thunderbird < 148, and Thunderbird < 140.8.
CVSS Score
9.8
EPSS Score
0.001
Published
2026-02-24
Malicious scripts that interrupt new tab page loading could cause desynchronization between the address bar and page content, allowing the attacker to spoof arbitrary HTML under a trusted domain. This vulnerability affects Firefox for iOS < 147.2.1.
CVSS Score
4.3
EPSS Score
0.0
Published
2026-02-16
Heap buffer overflow in libvpx. This vulnerability affects Firefox < 147.0.4, Firefox ESR < 140.7.1, Firefox ESR < 115.32.1, Thunderbird < 140.7.2, and Thunderbird < 147.0.2.
CVSS Score
8.8
EPSS Score
0.0
Published
2026-02-16
Mitigation bypass in the Privacy: Anti-Tracking component. This vulnerability affects Firefox < 147.0.2.
CVSS Score
6.5
EPSS Score
0.0
Published
2026-01-27
Use-after-free in the Layout: Scrolling and Overflow component. This vulnerability affects Firefox < 147.0.2.
CVSS Score
8.8
EPSS Score
0.0
Published
2026-01-27
Use-after-free in the JavaScript: GC component. This vulnerability affects Firefox < 147, Firefox ESR < 140.7, Thunderbird < 147, and Thunderbird < 140.7.
CVSS Score
6.5
EPSS Score
0.0
Published
2026-01-13
Incorrect boundary conditions in the Graphics component. This vulnerability affects Firefox < 147, Firefox ESR < 115.32, Firefox ESR < 140.7, Thunderbird < 147, and Thunderbird < 140.7.
CVSS Score
5.3
EPSS Score
0.0
Published
2026-01-13