CVE-2022-26485

Mozilla Firefox, Mozilla Firefox ESR, Mozilla Firefox for Android

Published 22 Dec 2022 · updated 19 Aug 2026 · Analyzed

8.8 High · CVSS 3.1, NVD

Exploited in the wild

CISA added this to its Known Exploited Vulnerabilities catalog on 7 Mar 2022, with a remediation deadline of 21 Mar 2022 for US federal agencies.

Required action: Apply updates per vendor instructions.

Description

Removing an XSLT parameter during processing could have lead to an exploitable use-after-free. We have had reports of attacks in the wild abusing this flaw. This vulnerability affects Firefox < 97.0.2, Firefox ESR < 91.6.1, Firefox for Android < 97.3.0, Thunderbird < 91.6.2, and Focus < 97.3.0.

References

bugzilla.mozilla.org/show_bug.cgi?id=1758062 · Exploit, Issue Tracking, Vendor Advisory
www.mozilla.org/security/advisories/mfsa2022-09/ · Vendor Advisory
www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-26485 · US Government Resource