CVE-2026-79317

Medium severity, CVSS 4.8. EPSS: 0.3% chance of exploitation in the next 30 days.

A session invalidation flaw exists in x-ui 0.3.2. The full user object is stored in a client-side signed cookie, and authentication only checks that a user object can be retrieved from the cookie without re-validating against the database or any session version. When an administrator changes the username or password, previously issued session cookies are not revoked, so an attacker who holds a pre-change admin cookie can continue accessing and operating the management interface after the credentials have been rotated.

Published 2026-09-21. Last modified 2026-09-22.