CVE-2026-0881

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

CVSS v3 10.0 CRITICAL

10.0^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 6.0

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

References

Link	Resource
https://bugzilla.mozilla.org/show_bug.cgi?id=2005845	Permissions Required
https://www.mozilla.org/security/advisories/mfsa2026-01/	Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-04/	Vendor Advisory
https://access.redhat.com/security/cve/CVE-2026-0881
https://bugzilla.redhat.com/show_bug.cgi?id=2428970
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-0881.json

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:mozilla:firefox:::::-:::*
	cpe:2.3:a:mozilla:thunderbird:::::-:::*

History

No history.

Information

Published : 2026-01-13 14:16

Updated : 2026-07-15 02:17

NVD link : CVE-2026-0881

Mitre link : CVE-2026-0881

CVE.ORG link : CVE-2026-0881

JSON object : View

Products Affected

mozilla

thunderbird
firefox

CWE

CWE-284

Improper Access Control

CWE-693

Protection Mechanism Failure

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