| Name | CVE-2026-0881 |
| Description | Sandbox escape in the Messaging System component. This vulnerability affects Firefox < 147. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| firefox (PTS) | sid | 146.0.1-1 | vulnerable |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| firefox | source | (unstable) | 147.0-1 | | | |
Notes
https://www.mozilla.org/en-US/security/advisories/mfsa2026-01/#CVE-2026-0881