CVE-2026-40082Cacti: Session Fixation via missing session_regenerate_id() after login

Descripción

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.

Datos: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Se publican tal como los indican las fuentes, en inglés.

Productos y versiones afectados

Referencias y parches

• https://github.com/Cacti/cacti/security/advisories/GHSA-273r-qr93-wgcp ExploitMitigationVendor Advisory
• https://github.com/Cacti/cacti/commit/2fa404e70a5702be10682555911228e8e51ba198 Patch
• https://github.com/Cacti/cacti/releases/tag/release%2F1.2.31 ProductRelease Notes