Unrated severityNVD Advisory· Published Sep 1, 2026

CVE-2026-84119

Description

Sandbox escape due to use-after-free in the DOM: Navigation component. This vulnerability was fixed in Firefox 155, Firefox ESR 115.40, Firefox ESR 140.15, and Firefox ESR 153.2.

Affected products

Mozilla Corporation/Firefoxllm-fuzzy
Range: before 155, before 115.40, before 140.15, before 153.2

Patches

Vulnerability mechanics

References

bugzilla.mozilla.org/show_bug.cginvd
www.mozilla.org/security/advisories/mfsa2026-82/nvd
www.mozilla.org/security/advisories/mfsa2026-83/nvd
www.mozilla.org/security/advisories/mfsa2026-84/nvd
www.mozilla.org/security/advisories/mfsa2026-85/nvd

News mentions

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