Session Fixation in Cacti - CVE-2026-40082
Published: June 19, 2026
Vulnerability identifier: #VU134962
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-40082
CWE-ID: CWE-384
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: The Cacti Group, Inc.
Affected software:
Cacti
Cacti
Detailed vulnerability description
The vulnerability allows a remote attacker to hijack a user's authenticated session.
The vulnerability exists due to session fixation in auth_login.php and include/auth.php when processing login requests. A remote attacker can set a known session identifier in the victim's browser and wait for the victim to log in to hijack a user's authenticated session.
User interaction is required because the victim must log in using the attacker-fixed session identifier.
How to mitigate CVE-2026-40082
Install security update from vendor's website.