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9.1 Critical

CVE-2026-74961 Side-channel in the Web Audio component

Description

Side-channel in the Web Audio component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.

Affected products and versions

Product	Affected versions	Fixed in
Firefox 154	earliest → < 154	154
Firefox 153.1	earliest → < 153.1	153.1
Thunderbird 154	earliest → < 154	154
Thunderbird 153.1	earliest → < 153.1	153.1

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 August 18, 2026
Last modified September 17, 2026

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