CVE-2026-102489
Received Received - Intake

Session Hijack Leading to RCE in Zammad

Publication date: 2026-09-30

Last updated on: 2026-09-30

Assigner: Dutch Institute for Vulnerability Disclosure

Description
Zammad versions 6.3.0 to 6.5.4 are vulnerable a session hijack vulnerability that leads to remote code execution as the zammad user. The vulnerability is also present in version 7.0.0 to version 7.1.3, but not exploitable due to environment conditions.

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Meta Information

Published
2026-09-30
Last Modified
2026-09-30
Generated
2026-09-30
AI Q&A
2026-09-30
EPSS Evaluated
N/A
NVD
CVE-2026-102489
EUVD
EUVD-2026-90080

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
zammad zammad From 6.3.0 (inc) to 6.5.4 (inc)
zammad zammad From 7.0.0 (inc) to 7.1.3 (inc)

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-UNKNOWN

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Executive Summary

Zammad versions 6.3.0 to 6.5.4 have a session hijack vulnerability that allows remote code execution as the zammad user. The issue also affects versions 7.0.0 to 7.1.3 but is not exploitable due to specific environment conditions.

Impact Analysis

An attacker could hijack sessions and execute arbitrary code on the affected system with the privileges of the zammad user. This could lead to full system compromise, data theft, or further network infiltration.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, violating GDPR and HIPAA requirements for data protection and confidentiality. Organizations may face compliance violations, fines, or legal consequences if exploited.

Mitigation Strategies

Immediately upgrade Zammad to a patched version (6.5.5 or later, or 7.1.4 or later) to address the session hijack vulnerability. Verify the upgrade was successful and monitor for unusual activity.

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