{"id":"CVE-2026-55552","summary":"Yamcs: Unauthenticated Directory Traversal","details":"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.","aliases":["GHSA-9jg3-g3wh-w9pj"],"modified":"2026-09-02T08:05:51.129672Z","published":"2026-08-28T17:18:45.617Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-22"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55552.json"},"references":[{"type":"WEB","url":"https://github.com/yamcs/yamcs/releases/tag/yamcs-5.11.13"},{"type":"WEB","url":"https://github.com/yamcs/yamcs/releases/tag/yamcs-5.12.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55552.json"},{"type":"ADVISORY","url":"https://github.com/yamcs/yamcs/security/advisories/GHSA-9jg3-g3wh-w9pj"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55552"},{"type":"FIX","url":"https://github.com/yamcs/yamcs/commit/c7dfd24e469ae1086c23e0fe04401cb1ce4260d4"},{"type":"FIX","url":"https://github.com/yamcs/yamcs/commit/f4bc588880c166849e983aa8f65b9c8107d06091"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/yamcs/yamcs","events":[{"introduced":"0"},{"fixed":"c7dfd24e469ae1086c23e0fe04401cb1ce4260d4"},{"fixed":"f4bc588880c166849e983aa8f65b9c8107d06091"},{"fixed":"f2f505ac4a9b4a8df80ac7ebe911f534eea99817"},{"fixed":"b6a0f04a4eb3a7af870d4d25422c33ffa870d3fb"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"5.12.0"}],"source":["AFFECTED_FIELD","REFERENCES"]}}],"versions":["yamcs-5.11.12","yamcs-5.11.11","yamcs-5.11.10","yamcs-5.11.9","yamcs-5.11.8","yamcs-5.11.7","yamcs-5.9.8","yamcs-5.11.6","yamcs-5.11.5","yamcs-5.11.4","yamcs-5.10.9","yamcs-5.11.3","yamcs-5.11.2","yamcs-5.11.1","yamcs-5.11.0","yamcs-5.10.8","yamcs-5.10.7","yamcs-5.10.6","yamcs-5.10.5","yamcs-5.10.4","yamcs-5.10.3","yamcs-5.10.2","yamcs-5.10.1","yamcs-5.10.0","yamcs-5.9.7","yamcs-5.9.6","yamcs-5.9.5","yamcs-5.9.4","yamcs-5.9.3","yamcs-5.9.2","yamcs-5.9.1","yamcs-5.9.0","yamcs-5.8.8","yamcs-5.8.7","yamcs-5.8.6","yamcs-5.8.5","yamcs-5.8.4","yamcs-5.8.3","yamcs-5.8.2","yamcs-5.8.0","yamcs-5.8.1","yamcs-5.7.10","yamcs-5.7.9","yamcs-5.7.8","yamcs-5.7.7","yamcs-5.7.6","yamcs-5.7.5","yamcs-5.7.4","yamcs-5.7.3","yamcs-5.7.2","yamcs-5.7.1","yamcs-5.7.0","yamcs-5.6.2","yamcs-5.5.7","yamcs-5.6.1","yamcs-5.6.0","yamcs-5.5.6","before-removing-cfdp-half-implemented-features","yamcs-5.5.5","yamcs-5.5.4","yamcs-5.5.3","yamcs-5.5.2","yamcs-5.5.1","yamcs-5.5.0","yamcs-5.3.5","yamcs-5.4.3","yamcs-5.4.2","yamcs-5.4.1","yamcs-5.4.0","yamcs-5.2.0","yamcs-5.3.4","yamcs-5.3.3","yamcs-5.3.2","yamcs-5.3.1","yamcs-5.3.0","yamcs-5.1.3","yamcs-5.1.2","yamcs-5.1.1","yamcs-5.1.0","yamcs-5.0.1","yamcs-5.0.0","yamcs-4.10.9","yamcs-4.10.8","yamcs-4.10.7","yamcs-4.10.6","yamcs-4.10.5","yamcs-4.10.4","yamcs-4.10.3","yamcs-4.10.2","yamcs-4.10.1","yamcs-4.10.0","yamcs-4.9.5","yamcs-4.9.4","yamcs-4.9.3","yamcs-4.9.2","yamcs-4.9.1","yamcs-4.9.0","yamcs-4.8.1","yamcs-4.8.0","yamcs-4.7.3","yamcs-4.7.2","yamcs-4.7.1","yamcs-4.7","yamcs-4.4.2","yamcs-4.4.1","yamcs-4.4.0","yamcs-4.3.1","yamcs-4.3.0","yamcs-4.2.2","yamcs-4.2.1","yamcs-4.2.0","yamcs-4.1.2","yamcs-4.1.1","yamcs-4.0.1","yamcs-3.4.0","yamcs-3.3.0","yamcs-3.2.2","yamcs-3.2.1","yamcs-3.2.0","yamcs-3.1.2","yamcs-3.1.1","yamcs-3.1.0","yamcs-3.0.0","yamcs-0.30.0","v0.29.4","v0.29.3-20160608","v0.29.3","v0.29.1","v0.29.1-20160127","v0.29.1-20160119","v0.29.1-20151214","v0.29.0","v0.28.0","v0.28.0-20150903","v0.28.0-20150902-2","v0.28.0-20150902","v0.28.0-20150901","v0.28.0-20150828","v0.28.0-20150827","v0.28.0-20150826","v0.28.0-20150825","v0.28.0-20150824","v0.28.0-20150820","v0.28.0-20150817","v0.28.0-20150811","v0.26.1","v0.26.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55552.json","vanir_signatures_modified":"2026-09-02T08:05:51Z","vanir_signatures":[{"deprecated":false,"digest":{"function_hash":"44504692117066412768290651635835148044","length":215},"id":"CVE-2026-55552-1f0655df","signature_type":"Function","signature_version":"v1","source":"https://github.com/yamcs/yamcs/commit/c7dfd24e469ae1086c23e0fe04401cb1ce4260d4","target":{"file":"yamcs-core/src/main/java/org/yamcs/http/StaticFileHandler.java","function":"locateFile"}},{"deprecated":false,"digest":{"line_hashes":["16253511461268113387516735528024691093","47131856729885217536715101966680264240","171909562685036065406765662656734654716","91861956314216692429366799229084964277","114224942825567201968517520567871342932","144368280349882285538415378672116534088","113835219182165317994577325558448021397","177650712664092153388428630558971960364"],"threshold":0.9},"id":"CVE-2026-55552-2bff5b21","signature_type":"Line","signature_version":"v1","source":"https://github.com/yamcs/yamcs/commit/f4bc588880c166849e983aa8f65b9c8107d06091","target":{"file":"yamcs-core/src/main/java/org/yamcs/http/StaticFileHandler.java"}},{"digest":{"function_hash":"44504692117066412768290651635835148044","length":215},"id":"CVE-2026-55552-4bd56d9b","signature_type":"Function","signature_version":"v1","source"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