Boundary Condition Flaw in Firefox's Audio/Video Component
CVE-2026-2788

9.8CRITICAL

Key Information:

Vendor

Mozilla
Status
Firefox
Firefox Esr
Thunderbird
Vendor
CVE Published:
24 February 2026

What is CVE-2026-2788?

A flaw in the Audio/Video: GMP component of Firefox allows for incorrect boundary conditions. This vulnerability potentially impacts handling media streams, which could lead to unexpected behavior or exposure of sensitive information across versions prior to 148 for regular Firefox and prior to 115.33 and 140.8 for extended support releases.

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Affected Version(s)

Firefox < 148

Firefox ESR < 115.33

Firefox ESR < 140.8

References

https://bugzilla.mozilla.org/show_bug.cgi?id=2014824
https://www.mozilla.org/security/advisories/mfsa2026-13/
https://www.mozilla.org/security/advisories/mfsa2026-14/

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

Information to follow
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