CVE-2026-40082CWE-384

Cacti: Session Fixation via missing session_regenerate_id() after login

Medium · published June 25, 2026

CVSS v3.1
5.4
EPSS
0%
Percentile
23.7
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.4 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00320 · 23.7th percentile
Weakness
CWE-384 · Session Fixation
Published
2026-06-25T22:33Z
EPSS history
Timeline
  • 25 JUN 22:33Z
    Cacti: Session Fixation via missing session_regenerate_id() after login
    cvelistv5