CVE-2026-6746

Description

Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.

PUBLISHED Reserved 2026-04-21 | Published 2026-04-21 | Updated 2026-04-22 | Assigner mozilla

Product status

Credits

Evyatar Ben Asher, Keane Lucas, Nicholas Carlini, Newton Cheng, Daniel Freeman, Alex Gaynor, and Joel Weinberger using Claude from Anthropic

References

bugzilla.mozilla.org/show_bug.cgi?id=2014596

www.mozilla.org/security/advisories/mfsa2026-30/

www.mozilla.org/security/advisories/mfsa2026-31/

www.mozilla.org/security/advisories/mfsa2026-32/

www.mozilla.org/security/advisories/mfsa2026-33/

www.mozilla.org/security/advisories/mfsa2026-34/

cve.org (CVE-2026-6746)

nvd.nist.gov (CVE-2026-6746)

Download JSON