Security Vulnerabilities
Mitigation bypass in the Add-ons Manager component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.
CVSS Score
9.8
EPSS Score
0.003
Published
2026-08-18
Integer overflow in the Graphics component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.
CVSS Score
7.5
EPSS Score
0.003
Published
2026-08-18
Clickjacking issue in the Widget component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.
CVSS Score
8.1
EPSS Score
0.002
Published
2026-08-18
Clickjacking issue in the Downloads component in Firefox for Android. This vulnerability was fixed in Firefox 154.
CVSS Score
6.5
EPSS Score
0.002
Published
2026-08-18
Same-origin policy bypass in the Graphics: ImageLib component. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.
CVSS Score
5.4
EPSS Score
0.001
Published
2026-08-18
JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.
CVSS Score
6.5
EPSS Score
0.003
Published
2026-08-18
Spoofing issue in the Downloads component in Firefox for Android. This vulnerability was fixed in Firefox 154.
CVSS Score
5.4
EPSS Score
0.002
Published
2026-08-18
Same-origin policy bypass in the Audio/Video: Playback component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.
CVSS Score
5.4
EPSS Score
0.001
Published
2026-08-18
Site isolation issue in the Graphics: WebRender component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.
CVSS Score
5.4
EPSS Score
0.001
Published
2026-08-18
Use-after-free in the Layout: Text and Fonts component. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.
CVSS Score
8.8
EPSS Score
0.003
Published
2026-08-18