- Critical 9.4
- Known exploited (CISA KEV)
CVE-2026-102489
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
The facts
- Published
- 30 September 2026
- Last changed
- 10 October 2026
- NVD status
- Analyzed
- Severity
- Critical, CVSS 9.4 out of 10 (version 4.0)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:A/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R… - Weakness
- Affects
- zammad zammad
- Known exploited
- Yes. CISA added it to the Known Exploited Vulnerabilities catalogue on 2 October 2026.
- EPSS
- 1.3% chance of exploitation activity in the next 30 days (percentile 69).
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