CVE-2026-118020 PUBLISHED

Use-after-free in the Layout component. This vulnerability was fixed in Firefox 159 and Thunderbird 159.

• Mozilla

• https://bugzilla.mozilla.org/show_bug.cgi?id=2075977
• https://www.mozilla.org/security/advisories/mfsa2026-118/
• https://www.mozilla.org/security/advisories/mfsa2026-121/