CVE-2026-109736

CVSS 8.1 (high) · published 2026-10-13

Frame poisoning in the Layout component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, Thunderbird 153.5, and Firefox ESR 115.45.

Weakness: CWE-451

Source: NVD CVE-2026-109736

References

• https://bugzilla.mozilla.org/show_bug.cgi?id=2029784
• https://www.mozilla.org/security/advisories/mfsa2026-106/
• https://www.mozilla.org/security/advisories/mfsa2026-108/
• https://www.mozilla.org/security/advisories/mfsa2026-109/
• https://www.mozilla.org/security/advisories/mfsa2026-110/
• https://www.mozilla.org/security/advisories/mfsa2026-126/

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