Unrated severityNVD Advisory· Published Oct 27, 2026· Updated Oct 27, 2026

CVE-2026-117990

Description

Sandbox escape due to incorrect boundary conditions in the Graphics: WebRender component. This vulnerability was fixed in Firefox 159 and Firefox ESR 153.6.

Affected products

Mozilla Corporation/Firefox Esrllm-fuzzy
Range: up to 153.6
Mozilla Corporation/Firefoxllm-fuzzy
Range: up to 159, up to 153.6

Patches

Vulnerability mechanics

References

bugzilla.mozilla.org/show_bug.cginvd
www.mozilla.org/security/advisories/mfsa2026-118/nvd
www.mozilla.org/security/advisories/mfsa2026-120/nvd

News mentions

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