{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-55552","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-06-16T23:01:04.075Z","datePublished":"2026-08-28T17:18:45.617Z","dateUpdated":"2026-08-31T18:54:23.899Z"},"containers":{"cna":{"title":"Yamcs: Unauthenticated Directory Traversal","problemTypes":[{"descriptions":[{"cweId":"CWE-22","lang":"en","description":"CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","version":"3.1"}}],"references":[{"name":"https://github.com/yamcs/yamcs/security/advisories/GHSA-9jg3-g3wh-w9pj","tags":["x_refsource_CONFIRM"],"url":"https://github.com/yamcs/yamcs/security/advisories/GHSA-9jg3-g3wh-w9pj"},{"name":"https://github.com/yamcs/yamcs/commit/c7dfd24e469ae1086c23e0fe04401cb1ce4260d4","tags":["x_refsource_MISC"],"url":"https://github.com/yamcs/yamcs/commit/c7dfd24e469ae1086c23e0fe04401cb1ce4260d4"},{"name":"https://github.com/yamcs/yamcs/commit/f4bc588880c166849e983aa8f65b9c8107d06091","tags":["x_refsource_MISC"],"url":"https://github.com/yamcs/yamcs/commit/f4bc588880c166849e983aa8f65b9c8107d06091"},{"name":"https://github.com/yamcs/yamcs/releases/tag/yamcs-5.11.13","tags":["x_refsource_MISC"],"url":"https://github.com/yamcs/yamcs/releases/tag/yamcs-5.11.13"},{"name":"https://github.com/yamcs/yamcs/releases/tag/yamcs-5.12.0","tags":["x_refsource_MISC"],"url":"https://github.com/yamcs/yamcs/releases/tag/yamcs-5.12.0"}],"affected":[{"vendor":"yamcs","product":"yamcs","versions":[{"version":"< 5.12.0","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-08-28T17:19:40.876Z"},"descriptions":[{"lang":"en","value":"Yamcs is a mission control framework. Prior to 5.11.13, Yamcs StaticFileHandler.locateFile resolves an unauthenticated request path without using Path.normalize and Path.toAbsolutePath to confirm that the absolute path remains within the configured staticRoots. A path containing traversal segments can escape the intended web root and return an arbitrary readable host file. The flaw is in yamcs-core/src/main/java/org/yamcs/http/StaticFileHandler.java and can disclose sensitive operating-system and application data. This issue is fixed in version 5.11.13, and the 5.12 line is fixed from version 5.12.0."}],"source":{"advisory":"GHSA-9jg3-g3wh-w9pj","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-31T15:42:22.826410Z","id":"CVE-2026-55552","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"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":"2026-08-31T18:54:23.899Z"}}]}}