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CVE-2026-0881 Details

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

CVSS 3.x Severity and Vector Strings:

CNA: redhat-SADPCVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

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URL	Source(s)	Tag(s)
https://access.redhat.com/security/cve/CVE-2026-0881	redhat-SADP
https://bugzilla.redhat.com/show_bug.cgi?id=2428970	redhat-SADP
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-0881.json	redhat-SADP
https://bugzilla.mozilla.org/show_bug.cgi?id=2005845	[email protected]	Permissions Required
https://www.mozilla.org/security/advisories/mfsa2026-01/	[email protected]	Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-04/	[email protected]	Vendor Advisory

CWE-ID	CWE Name	Source
CWE-284	Improper Access Control	CISA-ADP
CWE-693	Protection Mechanism Failure	CISA-ADP

Product	Versions
mozilla firefox	< 147.0
CPE cpe:2.3:a:mozilla:firefox:::::-:::* Remediation No remediation found in references.
mozilla thunderbird	< 147.0
CPE cpe:2.3:a:mozilla:thunderbird:::::-:::* Remediation No remediation found in references.

9 change records found show changes

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