Critical severity · published Jun 16, 2026
CVE-2026-12293
Use-after-free in the Graphics: WebGPU component
9.8
CVSS
0.3%
EPSS
No
On KEV
Description
Use-after-free in the Graphics: WebGPU component. This vulnerability was fixed in Firefox 152 and Thunderbird 152.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 23% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FI
Firefox · Mozilla
before 152.0.0 · source: NVD
TH
Thunderbird · Mozilla
before 152.0.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-12293
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-12293
Permissions Required
https://bugzilla.mozilla.org/show_bug.cgi?id=2039568
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-57/
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-60/
access.redhat.com
https://access.redhat.com/security/cve/CVE-2026-12293
bugzilla.redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2489216
security.access.redhat.com
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-12293.json
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