CVE-2026-44595 EXPLOIT
4.3
MEDIUM · CVSS 3.1 · EPSS 1.1% (pctl 64)
Patch early
A public exploit exists.
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.
Scoring
| CVSS | 4.3 (MEDIUM, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
| EPSS | 1.06% — more likely to be exploited than 64% of all CVEs |
| Weakness | CWE-862 |
| On CISA KEV | no |
| Public exploit | yes |
| Published | 2026-07-16 |
| Last modified | 2026-07-18 |
Affected (1)
| Vendor | Product |
|---|---|
| spaceapplications | yamcs |
Public exploits
| Source | Title | Date |
|---|---|---|
| exploit-db | YAMCS yamcs-core 5.12.7 - User Enumeration | 2026-05-30 |
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
- https://github.com/yamcs/yamcs/security/advisories/GHSA-p2rj-mrmc-9w29
→ the Explorer · watch your stack · NVD