{"action":"Upgrade org.yamcs:yamcs-core to 5.12.8 (5.12.x) or 5.13.2 (5.13.x) or later.","affected":[{"fixed":"5.12.8","introduced":"0"},{"fixed":"5.13.2","introduced":"5.13.0"}],"component":"org.yamcs:yamcs-core","cve_ids":["CVE-2026-55545"],"ecosystem":"Maven","epss":0.00451,"exploited":false,"fixed_versions":["5.12.8","5.13.2"],"ghsa_id":"GHSA-fwww-cp23-7f5g","id":"tcs_01M5N8WVM9QY63EA1H4C34MYBQ","modified_at":"2026-08-28T17:25:37.213660Z","published_at":"2026-08-28T17:10:26Z","references":["https://osv.dev/vulnerability/GHSA-fwww-cp23-7f5g","https://github.com/yamcs/yamcs/security/advisories/GHSA-fwww-cp23-7f5g","https://github.com/yamcs/yamcs/commit/0691731846c5a0aca81b88fabbd2cd51d56fe076","https://github.com/yamcs/yamcs/commit/12864af555e6ca4941b01c1f1217859cc0492ce0","https://github.com/yamcs/yamcs","https://github.com/yamcs/yamcs/releases/tag/yamcs-5.12.8","https://github.com/yamcs/yamcs/releases/tag/yamcs-5.13.2"],"severity":{"label":"medium","score":6.5},"sources":[{"source":"osv","source_id":"GHSA-fwww-cp23-7f5g","url":"https://osv.dev/vulnerability/GHSA-fwww-cp23-7f5g"}],"summary":"Yamcs's WebSocket subscription handlers omit the privilege checks their REST siblings enforce"}