PatchTheCVECVE-2026-44595: Yamcs is a mission control framework
CVE-2026-44595 is a medium-severity flaw (CVSS 4.3) affecting yamcs. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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
Why this priority
- Public exploit reference
A fixed release or distro patch exists.
Risk facts
| CVSS score | 4.3 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | Low |
| User interaction | None |
| EPSS exploit chance | 1.1% (top 36%) |
| CISA exploited list | No |
| Weakness | CWE-862 |
| Published | 2026-07-16 |
| Last modified | 2026-07-18 |
Last updated 2026-07-18 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Public exploits and detection
Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.
- Exploit-DB: YAMCS yamcs-core 5.12.7 - User Enumeration
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-44595?
yamcs: upgrade to 5.12.7. Exact commands for each OS are on this page.
Is CVE-2026-44595 being exploited?
CVE-2026-44595 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-44595 affect?
CVE-2026-44595 affects yamcs. Severity is medium (CVSS 4.3). 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/h
How urgent is CVE-2026-44595?
Priority 36/100. Public exploit reference
Software pages
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