CVE-2026-40082

Cacti: Session Fixation via missing session_regenerate_id() after login

CVSS 5.4 MEDIUMCWE-384

Vexday Risk Score

10Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 5.4EPSS —KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

25 Jun 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

Affected products

Cacti · cacti

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References

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