CVE-2026-0881 (CRITICAL 10.0) · Watchpost

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CVE-2026-0881

CRITICAL 10.0CVE-2026-0881 · Published 13/01/2026 · updated 15/07/2026

Package	Affected versions	Patched versions
firefox mozilla	`< 147.0`	`147.0`
thunderbird mozilla	`< 147.0`	`147.0`

Description

Sandbox escape in the Messaging System component. This vulnerability was fixed in Firefox 147 and Thunderbird 147.

References

bugzilla.mozilla.org/show_bug.cgi · Permissions Required
mozilla.org/security/advisories/mfsa2026-01 · Vendor Advisory
mozilla.org/security/advisories/mfsa2026-04 · Vendor Advisory
access.redhat.com/security/cve/CVE-2026-0881
bugzilla.redhat.com/show_bug.cgi
security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-0881.json

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