Boundary Condition Vulnerability in Firefox Graphics Component
CVE-2026-12324

7.3HIGH

Key Information:

Vendor

Mozilla
Status
Firefox
Thunderbird
Vendor
CVE Published:
16 June 2026

What is CVE-2026-12324?

A vulnerability exists within the Graphics: CanvasWebGL component of Firefox due to incorrect boundary conditions. This issue can potentially allow for unexpected behavior and may affect the integrity of web applications utilizing WebGL. The vulnerability has been addressed in versions Firefox 152 and Firefox ESR 140.12, underscoring the importance of keeping software up to date to mitigate security risks.

Affected Version(s)

Firefox 140.12

Firefox 152

Thunderbird 140.12

References

https://bugzilla.mozilla.org/show_bug.cgi?id=2038444
https://www.mozilla.org/security/advisories/mfsa2026-57/
https://www.mozilla.org/security/advisories/mfsa2026-58/

CVSS V3.1

Score:
7.3
Severity:
HIGH
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Mihalis Haatainen
.