Mozilla CVE-2026-0881
CRITICAL
Improper Access Control (CWE-284)
2026-01-13
security@mozilla.org
10.0
CVSS 3.1
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CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High
Lifecycle Timeline
3
Patch released
Apr 09, 2026 - 14:30 nvd
Patch available
Analysis Generated
Mar 12, 2026 - 21:54 vuln.today
CVE Published
Jan 13, 2026 - 14:16 nvd
CRITICAL 10.0
DescriptionNVD
Sandbox escape in the Messaging System component. This vulnerability affects Firefox < 147 and Thunderbird < 147.
AnalysisAI
Firefox Messaging System component has a sandbox escape vulnerability. Maximum CVSS 10.0 with scope change. …
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RemediationAI
Within 24 hours: Identify all affected systems and apply vendor patches immediately. Monitor vendor channels for patch availability.
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External POC / Exploit Code
Leaving vuln.today
Destination URL
POC code from unknown sources may be malicious, contain backdoors, or be fake.
Always review and test exploit code in a safe, isolated environment (VM/sandbox).
Verify the source reputation and cross-reference with known databases (Exploit-DB, GitHub Security).