CVE-2025-13023: Sandbox escape due to incorrect boundary conditions in the Graphics: WebGPU component

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-11-11 · updated 2026-10-18
Weakness: CWE-703

Description

Sandbox escape due to incorrect boundary conditions in the Graphics: WebGPU component. This vulnerability was fixed in Firefox 145 and Thunderbird 145.

Affected products

Mozilla Firefox: before 145.0 — fixed in 145.0

How to fix

Upgrade to a fixed version: Mozilla Firefox 145.0. Check the vendor advisory for mitigations.

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1992032
https://www.mozilla.org/security/advisories/mfsa2025-87/
https://www.mozilla.org/security/advisories/mfsa2025-90/

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