CVE-2026-40082

Cacti is an open source performance and fault management framework. Versions 1.2.30 and prior have missing session_regenerate_id() after login, leading to Session Fixation. session_regenerate_id() is NOT called after successful login. The login flow at auth_login.php:203-207 directly sets $_SESSION[SESS_USER_ID] without rotating the session ID. The session cookie configuration is otherwise good (httponly=true, samesite=Strict, secure=true for HTTPS at include/global.php:513-537), but these do not prevent session fixation via same-site vectors. This issue has been fixed in version 1.2.31.

• CWE-384

• https://github.com/Cacti/cacti/commit/2fa404e70a5702be10682555911228e8e51ba198Patch
• https://github.com/Cacti/cacti/releases/tag/release%2F1.2.31Product, Release Notes
• https://github.com/Cacti/cacti/security/advisories/GHSA-273r-qr93-wgcpExploit, Mitigation, Vendor Advisory

Published

Jun 25, 2026

Last Modified

Jun 29, 2026

Status

Analyzed

• 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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