CVE-2025-1936

jar: URLs retrieve local file content packaged in a ZIP archive. The null and everything after it was ignored when retrieving the content from the archive, but the fake extension after the null was used to determine the type of content. This could have been used to hide code in a web extension disguised as something else like an image. This vulnerability was fixed in Firefox 136, Firefox ESR 128.8, Thunderbird 136, and Thunderbird 128.8.

• CWE-158

• https://bugzilla.mozilla.org/show_bug.cgi?id=1940027Permissions Required
• https://www.mozilla.org/security/advisories/mfsa2025-14/Vendor Advisory
• https://www.mozilla.org/security/advisories/mfsa2025-16/Vendor Advisory
• https://www.mozilla.org/security/advisories/mfsa2025-17/Vendor Advisory
• https://www.mozilla.org/security/advisories/mfsa2025-18/Vendor Advisory
• https://lists.debian.org/debian-lts-announce/2025/03/msg00006.html

Published

Mar 4, 2025

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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