MSRXCVE-2026-102489
CVE-2026-102489
Zammad GmbH Zammad Session Fixation Vulnerability
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.
CVSS 4.0 · CNA · divd.nl
chance of exploitation in the next 30 days (EPSS; higher than 97% of CVEs)
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 bug is also present in version 7.0.0 to version 7.1.2, but not exploitable due to changes in the underlying framework.
Scores
Affected products
- zammad zammad: ≥ 6.3.0, ≤ 6.5.4
Weakness: CWE-384
5 references (advisories, patches, write-ups)
- https://community.zammad.org/t/take-care-local-privilege-escalation-cve-2026-102490-is-reported-as-being-actively-exploited/21297/2 · Vendor Advisory
- https://csirt.divd.nl/CVE-2026-102489 · Third Party Advisory
- https://csirt.divd.nl/DIVD-2026-00015 · Third Party Advisory
- https://zammad.com/en/advisories/cve-2026-102489-cve-2026-102490 · Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-102489 · US Government Resource
Sources: NVD, CVE.org, FIRST EPSS. Missing ones did not answer or have no record yet.