CVE-2026-102489
Undisclosed RCE in Zammad v6.3 and higher
- Published
- Sep 30, 2026
- Updated
- Oct 19, 2026
- Assigning CNA
- DIVD
- Evidence observed
- Oct 2, 2026
Primary CVSS
nvd · CVSS 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:X/V:C/RE:X/U:XLow · next 30 days
- Percentile
- 80.1%
- Model date
- Oct 25, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
CISA Known Exploited
This CVE appears in the CISA Known Exploited Vulnerabilities catalog.
Summary
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.
Sources
Proof-of-concept exploit for CVE-2026-102489 in Zammad: chains a WebSocket session leak into authenticated session hijacking and unauthenticated remote code execution.
Responsible use
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