{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-55547","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-06-16T23:01:04.075Z","datePublished":"2026-08-28T17:11:34.332Z","dateUpdated":"2026-08-28T20:30:11.670Z"},"containers":{"cna":{"title":"Yamcs: Missing Authorization on Role and Privilege Enumeration Endpoints Allows Any Authenticated User to Disclose Full Security Configuration","problemTypes":[{"descriptions":[{"cweId":"CWE-285","lang":"en","description":"CWE-285: Improper Authorization","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-862","lang":"en","description":"CWE-862: Missing Authorization","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":4.3,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","version":"3.1"}}],"references":[{"name":"https://github.com/yamcs/yamcs/security/advisories/GHSA-cvw4-55pp-3hfq","tags":["x_refsource_CONFIRM"],"url":"https://github.com/yamcs/yamcs/security/advisories/GHSA-cvw4-55pp-3hfq"},{"name":"https://github.com/yamcs/yamcs/commit/c2aec1c242e656e48b52c7f87deea88183bb592d","tags":["x_refsource_MISC"],"url":"https://github.com/yamcs/yamcs/commit/c2aec1c242e656e48b52c7f87deea88183bb592d"},{"name":"https://github.com/yamcs/yamcs/commit/dcaec5f0b2f4231b8e313e94d79a937169c9e0ba","tags":["x_refsource_MISC"],"url":"https://github.com/yamcs/yamcs/commit/dcaec5f0b2f4231b8e313e94d79a937169c9e0ba"},{"name":"https://github.com/yamcs/yamcs/releases/tag/yamcs-5.12.8","tags":["x_refsource_MISC"],"url":"https://github.com/yamcs/yamcs/releases/tag/yamcs-5.12.8"},{"name":"https://github.com/yamcs/yamcs/releases/tag/yamcs-5.13.2","tags":["x_refsource_MISC"],"url":"https://github.com/yamcs/yamcs/releases/tag/yamcs-5.13.2"}],"affected":[{"vendor":"yamcs","product":"yamcs","versions":[{"version":"< 5.12.8","status":"affected"},{"version":">= 5.13.0, < 5.13.2","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-08-28T17:11:34.332Z"},"descriptions":[{"lang":"en","value":"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."}],"source":{"advisory":"GHSA-cvw4-55pp-3hfq","discovery":"UNKNOWN"}},"adp":[{"references":[{"url":"https://github.com/yamcs/yamcs/security/advisories/GHSA-cvw4-55pp-3hfq","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-28T20:29:51.716854Z","id":"CVE-2026-55547","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-08-28T20:30:11.670Z"}}]}}