CVE-2026-12293 Use-after-free in the Graphics: WebGPU component
A use-after-free flaw in the WebGPU component allows attackers to execute arbitrary code, requiring users to upgrade to Firefox 152.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-12293?
CVE-2026-12293 is a critical use after free vulnerability in Mozilla Firefox, published on 16 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Use-after-free in the Graphics: WebGPU component. This vulnerability was fixed in Firefox 152 and Thunderbird 152.
Which versions are affected by CVE-2026-12293?
It affects 2 products.
Products include Mozilla Firefox, Mozilla Thunderbird.
How do I fix CVE-2026-12293?
Upgrade to a fixed version.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2026-12293 being exploited?
There is no known exploitation of CVE-2026-12293 in the wild and no public exploit code.
Other vulnerabilities in Mozilla Firefox
Sources
Also known as GHSA-x9gx-8m8x-g5mg, UBUNTU-CVE-2026-12293.