{"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": "2026-08-28T17:19:40.876Z"}, "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"}}}}

{}

{"affected": [{"affectedData": [{"product": "yamcs", "vendor": "yamcs", "versions": [{"status": "affected", "version": "< 5.12.0"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "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."}], "id": "CVE-2026-55552", "lastModified": "2026-08-28T20:18:28.793", "metrics": {"cvssMetricV31": [{"cvssData": {"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"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-08-28T20:18:28.793", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/yamcs/yamcs/commit/c7dfd24e469ae1086c23e0fe04401cb1ce4260d4"}, {"source": "security-advisories@github.com", "url": "https://github.com/yamcs/yamcs/commit/f4bc588880c166849e983aa8f65b9c8107d06091"}, {"source": "security-advisories@github.com", "url": "https://github.com/yamcs/yamcs/releases/tag/yamcs-5.11.13"}, {"source": "security-advisories@github.com", "url": "https://github.com/yamcs/yamcs/releases/tag/yamcs-5.12.0"}, {"source": "security-advisories@github.com", "url": "https://github.com/yamcs/yamcs/security/advisories/GHSA-9jg3-g3wh-w9pj"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-22"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{"created": "2026-08-28T21:00:04.543020+00:00", "updated": "2026-08-28T21:00:04.543026+00:00", "vendors": []}