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Description

Starting in Firefox 143, the use of the native messaging API by web extensions on Windows could lead to crashes caused by use-after-free memory corruption. This vulnerability affects Firefox < 144 and Thunderbird < 144.

PUBLISHED Reserved 2025-10-13 | Published 2025-10-14 | Updated 2025-10-14 | Assigner mozilla

Problem types

Use-after-free caused by the native messaging web extension API on Windows

Product status

Any version before 144
affected

Any version before 144
affected

Credits

Filip Štamcar

References

bugzilla.mozilla.org/show_bug.cgi?id=1991950

www.mozilla.org/security/advisories/mfsa2025-81/

www.mozilla.org/security/advisories/mfsa2025-84/

cve.org (CVE-2025-11719)

nvd.nist.gov (CVE-2025-11719)

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