CVE-2026-12293

Use-after-free in the Graphics: WebGPU component

CVSS 9.8 CRITICALEPSS 0.3%CWE-416 CWE-825

Vexday Risk Score

28Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 9.8EPSS 0.3%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

16 Jun 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

Use-after-free in the Graphics: WebGPU component. This vulnerability was fixed in Firefox 152 and Thunderbird 152.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Mozilla · Firefox Mozilla · Thunderbird

References

https://access.redhat.com/security/cve/CVE-2026-12293 https://bugzilla.mozilla.org/show_bug.cgi?id=2039568 https://bugzilla.redhat.com/show_bug.cgi?id=2489216 https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-12293.json https://www.mozilla.org/security/advisories/mfsa2026-57/https://www.mozilla.org/security/advisories/mfsa2026-60/