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Critical severity10.0NVD Advisory· Published Jan 13, 2026· Updated Apr 13, 2026

CVE-2026-0881

CVE-2026-0881

Description

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

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

5

Mozilla Corporation/Firefox2 versions
cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*+ 1 more
- cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*range: <147.0
- (no CPE)range: <=146
Mozilla Corporation/Thunderbird2 versions
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:*+ 1 more
- cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:*range: <147.0
- (no CPE)range: <=146
osv-coords
pkg:rpm/opensuse/MozillaFirefox&distro=openSUSE%20Tumbleweed
Range: < 147.0-1.1

Patches

Vulnerability mechanics

References

3

www.mozilla.org/security/advisories/mfsa2026-01/nvdVendor Advisory
www.mozilla.org/security/advisories/mfsa2026-04/nvdVendor Advisory
bugzilla.mozilla.org/show_bug.cginvdPermissions Required

News mentions

0

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