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6.5 Medium

CVE-2026-113401 Denial-of-service in the PDF Viewer component

Description

Denial-of-service in the PDF Viewer component. This vulnerability was fixed in Firefox 158.0.1 and Thunderbird 158.0.1.

Affected products and versions

Product	Affected versions	Fixed in
Firefox 158.0	earliest → < 158.0.1	158.0.1
Thunderbird 158.0	earliest → < 158.0.1	158.0.1

References

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

Timeline

Published October 20, 2026
Last modified October 20, 2026

The 2221 CVEs of Firefox →

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