CVE-2026-12289 is a vulnerability in Mozilla Firefox
Published on June 16, 2026
Privilege escalation in the Graphics: WebRender component
Privilege escalation in the Graphics: WebRender component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, and Firefox ESR 115.37.
Products Associated with CVE-2026-12289
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Affected Versions
Mozilla Firefox:- Version 115.37, <= 115.* is unaffected.
- Version 140.12, <= 140.* is unaffected.
- Version 152, <= * is unaffected.