{"action":"Upgrade org.yamcs:yamcs-core to 5.12.0 or later.","affected":[{"fixed":"5.12.0","introduced":"0"}],"component":"org.yamcs:yamcs-core","cve_ids":["CVE-2026-55552"],"ecosystem":"Maven","epss":0.01722,"exploited":false,"fixed_versions":["5.12.0"],"ghsa_id":"GHSA-9jg3-g3wh-w9pj","id":"tcs_01M5N8Q78W1K5VNQVGYR2CBN2Z","modified_at":"2026-08-28T17:40:35.592571Z","published_at":"2026-08-28T17:20:42Z","references":["https://osv.dev/vulnerability/GHSA-9jg3-g3wh-w9pj","https://github.com/yamcs/yamcs/security/advisories/GHSA-9jg3-g3wh-w9pj","https://github.com/yamcs/yamcs/commit/c7dfd24e469ae1086c23e0fe04401cb1ce4260d4","https://github.com/yamcs/yamcs/commit/f4bc588880c166849e983aa8f65b9c8107d06091","https://github.com/yamcs/yamcs","https://github.com/yamcs/yamcs/releases/tag/yamcs-5.11.13","https://github.com/yamcs/yamcs/releases/tag/yamcs-5.12.0"],"severity":{"label":"high","score":7.5},"sources":[{"source":"osv","source_id":"GHSA-9jg3-g3wh-w9pj","url":"https://osv.dev/vulnerability/GHSA-9jg3-g3wh-w9pj"}],"summary":"Yamcs has Unauthenticated Directory Traversal"}