Description
Yamcs is a mission control framework. Prior to 5.12.8 and 5.13.2, Yamcs omits SystemPrivilege.ControlAccess checks from IamApi.listRoles, IamApi.getRole, and IamApi.listPrivileges in yamcs-core/src/main/java/org/yamcs/http/api/IamApi.java. Any authenticated account can call GET /api/roles, GET /api/roles/{name}, and GET /api/privileges to enumerate available system privileges and configured role mappings. The disclosure reveals security configuration that can support targeted privilege-escalation attempts. This issue is fixed in versions 5.12.8 and 5.13.2.
References6
- github.com/yamcs/yamcs/commit/c2aec1c242e656e48b52c7f87deea8818…
- github.com/yamcs/yamcs/commit/dcaec5f0b2f4231b8e313e94d79a93716…
- github.com/yamcs/yamcs/releases/tag/yamcs-5.12.8
- github.com/yamcs/yamcs/releases/tag/yamcs-5.13.2
- github.com/yamcs/yamcs/security/advisories/GHSA-cvw4-55pp-3hfq
- github.com/yamcs/yamcs/security/advisories/GHSA-cvw4-55pp-3hfq
Metrics
- CVSS 3.1
-
4.3
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N - EPSS — exploit probability
- 0% percentile: 28 · as of 8 November 2026
- CWE
- CWE-285CWE-862
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.