Unrated severityNVD Advisory· Published Sep 29, 2026

CVE-2026-100794

Description

Sandbox escape due to incorrect boundary conditions in the Internationalization component. This vulnerability was fixed in Firefox ESR 153.4, Firefox 157, and Firefox ESR 140.17.

Affected products

Mozilla Corporation/Firefox Esrllm-fuzzy
Range: before 153.4, before 140.17
Mozilla Corporation/Firefoxllm-fuzzy
Range: before 157

Patches

Vulnerability mechanics

References

bugzilla.mozilla.org/show_bug.cginvd
www.mozilla.org/security/advisories/mfsa2026-100/nvd
www.mozilla.org/security/advisories/mfsa2026-97/nvd
www.mozilla.org/security/advisories/mfsa2026-99/nvd

News mentions

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