medium4.3Public exploit code
CVE-2026-44595
Yamcs vulnerable to unauthorized user enumeration via IAM API endpoints
Public exploit code
Working exploit or proof of concept code has been published for this vulnerability. Treat unpatched systems as at risk.
- YAMCS yamcs-core 5.12.7 - User Enumeration2026-05-30 · webapps · multiple
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| maven | org.yamcs:yamcs-core | < 5.12.7 | 5.12.7 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Spaceapplications | Yamcs | before 5.12.7 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-p2rj-mrmc-9w29
- https://github.com/yamcs/yamcs/security/advisories/GHSA-p2rj-mrmc-9w29
- https://github.com/yamcs/yamcs/commit/0e12b518f103f24681299318a30a460fe4327b88
- https://github.com/yamcs/yamcs/commit/e90099fba98e96214217c195b6a5b87b5f46e51c
- https://github.com/yamcs/yamcs/releases/tag/yamcs-5.12.7
- https://github.com/yamcs/yamcs/releases/tag/yamcs-5.13.0