Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Spaceapplications | Yamcs | < 5.12.7 |
Related Weaknesses (CWE)
References
- https://github.com/yamcs/yamcs/commit/0e12b518f103f24681299318a30a460fe4327b88Patch
- https://github.com/yamcs/yamcs/commit/e90099fba98e96214217c195b6a5b87b5f46e51cPatch
- https://github.com/yamcs/yamcs/releases/tag/yamcs-5.12.7Release Notes
- https://github.com/yamcs/yamcs/releases/tag/yamcs-5.13.0Release Notes
- https://github.com/yamcs/yamcs/security/advisories/GHSA-p2rj-mrmc-9w29ExploitVendor Advisory
- https://github.com/yamcs/yamcs/security/advisories/GHSA-p2rj-mrmc-9w29ExploitVendor Advisory
FAQ
What is CVE-2026-44595?
CVE-2026-44595 is a vulnerability with a CVSS score of 4.3 (MEDIUM). 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...
How severe is CVE-2026-44595?
CVE-2026-44595 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-44595?
Check the references section above for vendor advisories and patch information. Affected products include: Spaceapplications Yamcs.