CVE-2026-118023

HIGH 8.8CVE-2026-118023 · Published 27/10/2026 · updated 05/11/2026

In short

CVE-2026-118023 is a HIGH (CVSS 8.8) vulnerability.
Chance of exploitation in the next 30 days (EPSS): 0.24%, higher than 15.2% of all vulnerabilities.
No patched version is listed yet: follow the vendor's advisory in References.

Package	Affected versions	Patched versions
—	No affected product versions are listed for this vulnerability yet.

Sandbox escape due to use-after-free in the Graphics: WebRender component. This vulnerability was fixed in Firefox 159 and Thunderbird 159.

Running one of these products? Scan your site to see whether it exposes a vulnerable version.