{"action":"Upgrade openc3 to 6.10.5 or later.","affected":[{"fixed":"6.10.5","introduced":"0"},{"fixed":"7.0.0-rc3","introduced":"7.0.0.pre.rc1"}],"component":"openc3","cve_ids":["CVE-2026-42085"],"ecosystem":"RubyGems","epss":0.00313,"exploited":false,"fixed_versions":["6.10.5","7.0.0-rc3"],"ghsa_id":"GHSA-4jvx-93h3-f45h","id":"tcs_01M5KEGMZ8TC5BEKVRFM73X8E8","modified_at":"2026-09-10T03:50:42.680585110Z","published_at":"2026-04-22T22:22:02Z","references":["https://osv.dev/vulnerability/GHSA-4jvx-93h3-f45h","https://github.com/OpenC3/cosmos/security/advisories/GHSA-4jvx-93h3-f45h","https://nvd.nist.gov/vuln/detail/CVE-2026-42085","https://github.com/OpenC3/cosmos/commit/9957a9fa460c0c0cf5cdbf6a5931bbdd025246a5","https://github.com/OpenC3/cosmos/commit/e6efccbd148ba0e3361c5891027f2373aa140d42","https://github.com/OpenC3/cosmos","https://github.com/OpenC3/cosmos/releases/tag/v6.10.5","https://github.com/OpenC3/cosmos/releases/tag/v7.0.0-rc3","https://github.com/rubysec/ruby-advisory-db/blob/master/gems/openc3/CVE-2026-42085.yml"],"severity":{"label":"medium","score":4.3},"sources":[{"source":"osv","source_id":"GHSA-4jvx-93h3-f45h","url":"https://osv.dev/vulnerability/GHSA-4jvx-93h3-f45h"}],"summary":"OpenC3 COSMOS allows arbitrary writes to plugins directory via path-traversed config filenames"}