Security Vulnerabilities
Other issue in the DOM: Navigation component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.2, Thunderbird 155, and Thunderbird 153.2.
CVSS Score
6.1
EPSS Score
0.001
Published
2026-09-01
Spoofing issue in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.2, Thunderbird 155, and Thunderbird 153.2.
CVSS Score
4.3
EPSS Score
0.001
Published
2026-09-01
Denial-of-service in the PDF Viewer component. This vulnerability was fixed in Firefox 155 and Thunderbird 155.
CVSS Score
6.5
EPSS Score
0.001
Published
2026-09-01
Use-after-free in the Audio/Video component. This vulnerability was fixed in Firefox 155, Firefox ESR 140.15, Firefox ESR 153.2, Thunderbird 155, Thunderbird 140.15, and Thunderbird 153.2.
CVSS Score
5.4
EPSS Score
0.002
Published
2026-09-01
Privilege escalation due to use-after-free in the Graphics: WebGPU component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.2, Thunderbird 155, and Thunderbird 153.2.
CVSS Score
8.8
EPSS Score
0.002
Published
2026-09-01
Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 155, Firefox ESR 140.15, Firefox ESR 153.2, Thunderbird 155, Thunderbird 140.15, and Thunderbird 153.2.
CVSS Score
5.4
EPSS Score
0.002
Published
2026-09-01
Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.2, Thunderbird 155, and Thunderbird 153.2.
CVSS Score
5.4
EPSS Score
0.002
Published
2026-09-01
Incorrect boundary conditions in the Layout: Grid component. This vulnerability was fixed in Firefox 155 and Thunderbird 155.
CVSS Score
4.3
EPSS Score
0.002
Published
2026-09-01
Information disclosure in the WebExtensions component in Firefox for Android. This vulnerability was fixed in Firefox 155.
CVSS Score
4.3
EPSS Score
0.002
Published
2026-09-01
Privilege escalation in the WebDriver BiDi component. This vulnerability was fixed in Firefox 155 and Thunderbird 155.
CVSS Score
8.8
EPSS Score
0.002
Published
2026-09-01