Unrated severityNVD Advisory· Published Oct 13, 2026

CVE-2026-109705

Description

Sandbox escape, site isolation issue due to incorrect boundary conditions, use-after-free in the Networking component. This vulnerability was fixed in Firefox 158 and Firefox ESR 153.5.

Affected products

Mozilla Corporation/Firefox Esrllm-fuzzy
Range: up to 153.5
Mozilla Corporation/Firefoxllm-fuzzy
Range: up to 158

Patches

Vulnerability mechanics

References

bugzilla.mozilla.org/show_bug.cginvd
www.mozilla.org/security/advisories/mfsa2026-106/nvd
www.mozilla.org/security/advisories/mfsa2026-108/nvd

News mentions

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