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Description

Use-after-free in the JavaScript: WebAssembly component. This vulnerability affects Firefox < 148 and Thunderbird < 148.

PUBLISHED Reserved 2026-02-19 | Published 2026-02-24 | Updated 2026-03-06 | Assigner mozilla

Product status

Any version before 148
affected

Any version before 148
affected

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=2013584

www.mozilla.org/security/advisories/mfsa2026-13/

www.mozilla.org/security/advisories/mfsa2026-16/

cve.org (CVE-2026-2804)

nvd.nist.gov (CVE-2026-2804)

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