CVE-2026-100801

Privilege escalation in the DLL Services component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 159, Firefox ESR 153.6, Thunderbird 159, Thunderbird 153.6, Firefox 157, and Firefox ESR 140.17.

• CWE-269

• https://bugzilla.mozilla.org/show_bug.cgi?id=2057112Permissions Required
• https://www.mozilla.org/security/advisories/mfsa2026-100/Vendor Advisory
• https://www.mozilla.org/security/advisories/mfsa2026-101/Vendor Advisory
• https://www.mozilla.org/security/advisories/mfsa2026-102/Vendor Advisory
• https://www.mozilla.org/security/advisories/mfsa2026-103/Vendor Advisory
• https://www.mozilla.org/security/advisories/mfsa2026-118/
• https://www.mozilla.org/security/advisories/mfsa2026-120/
• https://www.mozilla.org/security/advisories/mfsa2026-121/
• https://www.mozilla.org/security/advisories/mfsa2026-122/
• https://www.mozilla.org/security/advisories/mfsa2026-97/Vendor Advisory
• https://www.mozilla.org/security/advisories/mfsa2026-99/Vendor Advisory

Published

Sep 29, 2026

Last Modified

Oct 27, 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.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
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