Auth bypass in Yamcs

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/…

Vulnerability class: Broken Access Control

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.

Affected products

  • Yamcs — versions < 5.12.7

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2026-44595?
CVE-2026-44595 is a medium-severity vulnerability in Yamcs, classified under Missing Authorization. CVSS score: 4.3/10. Published 2026-07-16.
How severe is CVE-2026-44595?
Medium severity. CVSS v3 base score is 4.3 out of 10.
Is CVE-2026-44595 known to be exploited?
1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.