Session fixation in Zammad - CVE-2026-102489
Published: October 2, 2026
Vulnerability identifier: #VU153198
CSH Severity: Critical
CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-102489
CWE-ID: CWE-384
Exploitation vector: Remote access
Exploit availability:
The vulnerability is being exploited in the wild
Vulnerability details
The vulnerability allows a remote attacker to compromise the affected system.
The vulnerability exists due to session fixation issue. A remote attacker can hijack session of a high privileged user and execute arbitrary code on the system.
Note, the vulnerability is being actively exploited in the wild.
Affected software
Zammad
How to mitigate CVE-2026-102489
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.
According to DIVD, vulnerability is not exploitable in versions 7.0.0 to 7.1.3 due to environment conditions.