CVE-2026-118019

CVSS 8.8 (high) · published 2026-10-27

Race condition, use-after-free in the DOM: File component. This vulnerability was fixed in Firefox 159, Thunderbird 159, Firefox ESR 153.7, and Thunderbird 153.7.

Weakness: CWE-362

Source: NVD CVE-2026-118019

References

• https://bugzilla.mozilla.org/show_bug.cgi?id=2025386
• https://www.mozilla.org/security/advisories/mfsa2026-118/
• https://www.mozilla.org/security/advisories/mfsa2026-121/
• https://www.mozilla.org/security/advisories/mfsa2026-127/
• https://www.mozilla.org/security/advisories/mfsa2026-129/

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