critical10.0
CVE-2026-0881
Sandbox escape in the Messaging System component.
Impact
Sandbox escape in the Messaging System component. This vulnerability was fixed in Firefox 147 and Thunderbird 147.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Mozilla | Firefox | before 147.0 |
| Mozilla | Thunderbird | before 147.0 |
Weakness classification
References
- NVD record
- CVE.org record
- https://bugzilla.mozilla.org/show_bug.cgi?id=2005845
- https://www.mozilla.org/security/advisories/mfsa2026-01/
- https://www.mozilla.org/security/advisories/mfsa2026-04/
- 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