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.

CVSS v3 5.4 MEDIUM

5.4^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 2.5

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/Cacti/cacti/commit/2fa404e70a5702be10682555911228e8e51ba198	Patch
https://github.com/Cacti/cacti/releases/tag/release%2F1.2.31	Product Release Notes
https://github.com/Cacti/cacti/security/advisories/GHSA-273r-qr93-wgcp	Exploit Mitigation Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:cacti:cacti:*:*:*:*:*:*:*:*

History

29 Jun 2026, 18:50

Type	Values Removed	Values Added
References	~~() https://github.com/Cacti/cacti/commit/2fa404e70a5702be10682555911228e8e51ba198 -~~	() https://github.com/Cacti/cacti/commit/2fa404e70a5702be10682555911228e8e51ba198 - Patch
References	~~() https://github.com/Cacti/cacti/releases/tag/release%2F1.2.31 -~~	() https://github.com/Cacti/cacti/releases/tag/release%2F1.2.31 - Product, Release Notes
References	~~() https://github.com/Cacti/cacti/security/advisories/GHSA-273r-qr93-wgcp -~~	() https://github.com/Cacti/cacti/security/advisories/GHSA-273r-qr93-wgcp - Exploit, Mitigation, Vendor Advisory
CPE		cpe:2.3:a:cacti:cacti::::::::
First Time		Cacti Cacti cacti

25 Jun 2026, 23:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-06-25 23:17

Updated : 2026-06-29 18:50

NVD link : CVE-2026-40082

Mitre link : CVE-2026-40082

CVE.ORG link : CVE-2026-40082

JSON object : View

Products Affected

cacti

cacti

CWE

CWE-384

Session Fixation

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