CVE-2026-0881
Critical · 10.0CVSS
10.0
EPSS
0.3%
Published
Jan 13, 2026
CISA due date
—
The record
Sandbox escape in the Messaging System component. This vulnerability was fixed in Firefox 147 and Thunderbird 147.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| openSUSE:Tumbleweed | MozillaFirefox | 0 | 147.0-1.1 |
Related vulnerabilities
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- CVE-2026-12325 Denial-of-service in the Graphics: ImageLib component. Also affects MozillaFirefox
- CVE-2026-12327 Memory safety bugs present in Firefox ESR 140.11, Thunderbird ESR 140.11, Firefox 151 and… Also affects MozillaFirefox
- CVE-2026-12326 Memory safety bugs present in Firefox 151 and Thunderbird 151. Also affects MozillaFirefox
- CVE-2026-12328 Memory safety bugs present in Firefox ESR 115.36, Firefox ESR 140.11, Thunderbird ESR… Also affects MozillaFirefox
- CVE-2026-12318 Incorrect boundary conditions in the Libraries component in NSS. Also affects MozillaFirefox
- CVE-2026-12319 Denial-of-service in the Audio/Video: Playback component. Also affects MozillaFirefox