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6.5 Medium

CVE-2025-10532 Incorrect boundary conditions in the JavaScript: GC component

Description

Incorrect boundary conditions in the JavaScript: GC component. This vulnerability was fixed in Firefox 143, Firefox ESR 140.3, Thunderbird 143, and Thunderbird 140.3.

Affected products and versions

Product	Affected versions	Fixed in
Firefox 143	earliest → < 143	143
Firefox 140.3	earliest → < 140.3	140.3
Firefox ESR 140.3	earliest → < 140.3	140.3
Thunderbird 143	earliest → < 143	143
Thunderbird 140.3	earliest → < 140.3	140.3

References

bugzilla.mozilla.org bugzilla.mozilla.org
www.mozilla.org www.mozilla.org
www.mozilla.org www.mozilla.org
www.mozilla.org www.mozilla.org
www.mozilla.org www.mozilla.org

Timeline

Published September 16, 2025
Last modified April 13, 2026

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