CVE-2026-102489
Zammad GmbH Zammad Session Fixation Vulnerability
Exploited in the wild
This vulnerability is on the CISA Known Exploited Vulnerabilities list, added 2026-10-02. Federal due date: 2026-10-05.
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
Impact
Zammad GmbH Zammad contains a session fixation vulnerability that can lead to remote code execution as the zammad user. This vulnerability can be chained with CVE-2026-102490.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Zammad | Zammad | from 6.3.0 through 6.5.4 |
Weakness classification
References
- NVD record
- CVE.org record
- CISA KEV catalog
- https://community.zammad.org/t/take-care-local-privilege-escalation-cve-2026-102490-is-reported-as-being-actively-exploited/21297/2
- https://csirt.divd.nl/CVE-2026-102489
- https://csirt.divd.nl/DIVD-2026-00015
- https://zammad.com/en/advisories/cve-2026-102489-cve-2026-102490
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-102489