Use-After-Free Vulnerability in Firefox by Mozilla
CVE-2025-14326

9.8CRITICAL

Key Information:

Vendor

Mozilla
Status
Firefox
Thunderbird
Vendor
CVE Published:
9 December 2025

What is CVE-2025-14326?

This vulnerability involves a use-after-free condition within the Audio/Video GMP (Google Media Plugin) component of Firefox, which may lead to potential exploitation. It affects versions of Firefox below 146, exposing users to various security risks.

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Affected Version(s)

Firefox < 146

Thunderbird < 146

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1840666
https://www.mozilla.org/security/advisories/mfsa2025-92/
https://www.mozilla.org/security/advisories/mfsa2025-95/

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Andrew McCreight
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