{"id":"CVE-2026-55547","title":"Yamcs is a mission control framework","summary":"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.jav…","severity":"medium","cvss":4.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","cwe":["CWE-285","CWE-862"],"vendor":"yamcs","product":"org.yamcs:yamcs-core","affected":["org.yamcs:yamcs-core >= 5.13.0, <= 5.13.1","org.yamcs:yamcs-core <= 5.12.7"],"patched":["org.yamcs:yamcs-core 5.13.2","org.yamcs:yamcs-core 5.12.8"],"published":"2026-08-28","updated":"2026-09-08","sourceUpdated":"2026-09-08T21:08:37.320","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-55547","references":[{"url":"https://github.com/yamcs/yamcs/commit/c2aec1c242e656e48b52c7f87deea88183bb592d","label":"security-advisories@github.com"},{"url":"https://github.com/yamcs/yamcs/commit/dcaec5f0b2f4231b8e313e94d79a937169c9e0ba","label":"security-advisories@github.com"},{"url":"https://github.com/yamcs/yamcs/releases/tag/yamcs-5.12.8","label":"security-advisories@github.com"},{"url":"https://github.com/yamcs/yamcs/releases/tag/yamcs-5.13.2","label":"security-advisories@github.com"},{"url":"https://github.com/yamcs/yamcs/security/advisories/GHSA-cvw4-55pp-3hfq","label":"security-advisories@github.com"},{"url":"https://github.com/yamcs/yamcs/security/advisories/GHSA-cvw4-55pp-3hfq","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://github.com/advisories/GHSA-cvw4-55pp-3hfq"}],"tags":["nvd","ghsa","maven"],"epss":0.00251,"epssPercentile":0.16757,"aliases":["GHSA-cvw4-55pp-3hfq"],"ecosystem":"maven","ingestedAt":"2026-08-28T17:22:56.196Z","slug":"CVE-2026-55547","body":"## Overview\n\nYamcs 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-55547)\n\nAffected packages:\n\n- `org.yamcs:yamcs-core >= 5.13.0, <= 5.13.1`\n- `org.yamcs:yamcs-core <= 5.12.7`\n\nPatched in:\n\n- `org.yamcs:yamcs-core 5.13.2`\n- `org.yamcs:yamcs-core 5.12.8`\n\nSource: https://github.com/advisories/GHSA-cvw4-55pp-3hfq","depth":"sunlit","depthScore":24,"depthScoreParts":{"impact":23.7,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}