Security Vulnerabilities
Memory safety bugs present in Firefox 147 and Thunderbird 147. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 148 and Thunderbird < 148.
CVSS Score
9.8
EPSS Score
0.001
Published
2026-02-24
Use-after-free in the JavaScript: GC component. This vulnerability affects Firefox < 148 and Thunderbird < 148.
CVSS Score
9.8
EPSS Score
0.0
Published
2026-02-24
JIT miscompilation in the JavaScript: WebAssembly component. This vulnerability affects Firefox < 148 and Thunderbird < 148.
CVSS Score
9.8
EPSS Score
0.001
Published
2026-02-24
Use-after-free in the JavaScript: GC component. This vulnerability affects Firefox < 148 and Thunderbird < 148.
CVSS Score
9.8
EPSS Score
0.0
Published
2026-02-24
Use-after-free in the DOM: Core & HTML component. This vulnerability affects Firefox < 148 and Thunderbird < 148.
CVSS Score
8.8
EPSS Score
0.0
Published
2026-02-24
Use-after-free in the DOM: Core & HTML component. This vulnerability affects Firefox < 148 and Thunderbird < 148.
CVSS Score
9.8
EPSS Score
0.0
Published
2026-02-24
Spoofing issue in the WebAuthn component in Firefox for Android. This vulnerability affects Firefox < 148 and Thunderbird < 148.
CVSS Score
9.8
EPSS Score
0.001
Published
2026-02-24
Incorrect boundary conditions in the JavaScript: WebAssembly component. This vulnerability affects Firefox < 148 and Thunderbird < 148.
CVSS Score
7.5
EPSS Score
0.001
Published
2026-02-24
Race condition in the JavaScript: GC component. This vulnerability affects Firefox < 148 and Thunderbird < 148.
CVSS Score
4.2
EPSS Score
0.0
Published
2026-02-24
Information disclosure, mitigation bypass in the Settings UI component. This vulnerability affects Firefox < 148 and Thunderbird < 148.
CVSS Score
7.5
EPSS Score
0.001
Published
2026-02-24