CVE-2026-40082
Cacti: Session Fixation via missing session_regenerate_id() after login
- State
- Published
- Severity
- 5.4 Medium
- Published
- Jun 25, 2026
- Updated
- Jun 26, 2026
- Reserved
- Apr 9, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 5.4 Medium | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N | GitHub_M |
Weaknesses
- CWE-384 Session Fixation
Affected Products
| Product | Versions |
|---|---|
cactiCacti |
|
References
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