CVE-2026-102490: Zammad GmbH Zammad Improper Privilege Management Vulnerability
Zammad GmbH Zammad contains an improper privilege management vulnerability that can allow the local zammad user to escalate privileges to root. This vulnerability can be chained with CVE-2026-102489.
Other sources
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.
— MITRE
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Compensating control
Discontinue use of Zammad if mitigations are unavailable.
Event History
Frequently Asked Questions
Who is exposed to this issue?
Systems running any affected Zammad version are exposed if a local process or user can operate as the zammad account. The issue allows that local account to escalate privileges to root.
Does this require remote access or authentication to Zammad?
The available information describes this as a local privilege-escalation issue. It identifies the local zammad user as the attacker prerequisite and does not state that remote access to the Zammad application alone is sufficient.
Are pre-release builds affected?
Yes. The affected range includes Zammad versions from v1.5.0 through v7.1.0-alpha, including the latest alpha.