Detections
Analytics
CVE-2026-44595
medium
Description
Yamcs is a mission control framework. Prior to 5.12.7, the IAM API endpoints listUsers, getUser, listGroups, and getGroup in yamcs-core did not enforce the required SystemPrivilege.ControlAccess check in yamcs-core/src/main/java/org/yamcs/http/api/IamApi.java, so any authenticated user, even one with low or no privileges, could enumerate all user accounts in the system including their usernames, superuser status, and group memberships. This issue is fixed in versions 5.12.7 and 5.13.0.
References
https://github.com/yamcs/yamcs/security/advisories/GHSA-p2rj-mrmc-9w29
https://github.com/yamcs/yamcs/releases/tag/yamcs-5.13.0
https://github.com/yamcs/yamcs/releases/tag/yamcs-5.12.7
https://github.com/yamcs/yamcs/commit/e90099fba98e96214217c195b6a5b87b5f46e51c
https://github.com/yamcs/yamcs/commit/0e12b518f103f24681299318a30a460fe4327b88