CVE-2026-102490: Zammad GmbH Zammad Improper Privilege Management Vulnerability
Zammad packages built with packager.io (DEB and RPM) could have allowed a local attacker who already had file system write privileges as the unprivileged zammad service account to escalate to full root privileges on the host. Service processes began running as root and executed files that were owned and writable by the zammad account before dropping their identity to that account. An attacker holding that foothold could have escalated within seconds, because the affected services were restarted automatically whenever they stopped; no administrator interaction was required. Only installations from the DEB and RPM packages were affected — installations from source or the official container images were not. All released packaged versions were affected.
Details
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:XFrequently asked questions
Is CVE-2026-102490 being actively exploited?
Yes — CISA lists CVE-2026-102490 in its Known Exploited Vulnerabilities (KEV) catalog, so it is confirmed exploited in the wild. Patch it as a priority.
What does CVE-2026-102490 affect?
CVE-2026-102490 affects Zammad GmbH · Zammad.
How do I fix CVE-2026-102490?
Apply the vendor’s patch for the affected software. The federal patch deadline was Oct 5, 2026. Then check whether your personal data was exposed in any related breach.