Description
Sandbox escape in the Messaging System component. This vulnerability was fixed in Firefox 147 and Thunderbird 147.
Metrics
CVSS 3.1 10.0/10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | — |
| Mozilla | Thunderbird | — |
| Red Hat | Red Hat Enterprise Linux 10 | — |
| Red Hat | Red Hat Enterprise Linux 10 | — |
| Red Hat | Red Hat Enterprise Linux 6 | — |
| Red Hat | Red Hat Enterprise Linux 7 | — |
| Red Hat | Red Hat Enterprise Linux 8 | — |
| Red Hat | Red Hat Enterprise Linux 9 | — |
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=2005845Permissions Required
- https://www.mozilla.org/security/advisories/mfsa2026-01/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-04/Vendor Advisory
- https://access.redhat.com/security/cve/CVE-2026-0881
- https://bugzilla.redhat.com/show_bug.cgi?id=2428970
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-0881.json
Timeline
- Published
- Jan 13, 2026
- Last modified
- Jul 15, 2026
- NVD status
- Modified