Sandbox Escape Vulnerability in Firefox WebGPU Component
CVE-2025-13026

9.8CRITICAL

Key Information:

Vendor

Mozilla
Status
Firefox
Thunderbird
Vendor
CVE Published:
11 November 2025

What is CVE-2025-13026?

A vulnerability has been identified in the Graphics: WebGPU component of Firefox, which allows for a sandbox escape due to incorrect boundary conditions. This could potentially enable attackers to break out of the restricted environment of the WebGPU component, posing risks to user data and system integrity. Users are encouraged to update to the latest version of Firefox to mitigate any potential threats.

Affected Version(s)

Firefox < 145

Thunderbird < 145

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1994441
https://www.mozilla.org/security/advisories/mfsa2025-87/
https://www.mozilla.org/security/advisories/mfsa2025-90/

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

Jamie Nicol
JSON
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CVE-2025-13026 : Sandbox Escape Vulnerability in Firefox WebGPU Component