CVE-2026-44595

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.

Score

CVSS 3.1 4.3 Medium

Status

Modified - security-advisories@github.com

Published

2026-07-16

Last modified

2026-07-18

Weaknesses

CWE-862

Affected products

• Yamcs (Spaceapplications)
• Yamcs (Yamcs)

References

• 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
• https://github.com/yamcs/yamcs/security/advisories/GHSA-p2rj-mrmc-9w29