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CVE-2026-0881
CRITICAL10.0
Description
Sandbox escape in the Messaging System component. This vulnerability affects Firefox < 147 and Thunderbird < 147.
CVE Details
CVSS v3.1 Score10.0
SeverityCRITICAL
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Attack VectorNETWORK
ComplexityLOW
Privileges RequiredNONE
User InteractionNONE
Published1/13/2026
Last Modified1/22/2026
Sourcenvd
Honeypot Sightings0
Affected Products
mozilla:firefoxmozilla:thunderbird
Weaknesses (CWE)
CWE-284CWE-693
References
https://bugzilla.mozilla.org/show_bug.cgi?id=2005845(security@mozilla.org)
https://www.mozilla.org/security/advisories/mfsa2026-01/(security@mozilla.org)
https://www.mozilla.org/security/advisories/mfsa2026-04/(security@mozilla.org)
IOC Correlations
No correlations recorded
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