{"action":"Upgrade oj to 3.17.3 or later.","affected":[{"fixed":"3.17.3","introduced":"0"}],"component":"oj","cve_ids":["CVE-2026-54901"],"ecosystem":"RubyGems","epss":0.00333,"exploited":false,"fixed_versions":["3.17.3"],"ghsa_id":"GHSA-vwm4-62gf-x745","id":"tcs_01M5KENQBCHS434XCNVYVB14AW","modified_at":"2026-09-10T03:50:12.355627780Z","published_at":"2026-06-19T20:47:25Z","references":["https://osv.dev/vulnerability/GHSA-vwm4-62gf-x745","https://github.com/ohler55/oj/security/advisories/GHSA-vwm4-62gf-x745","https://github.com/ohler55/oj"],"severity":{"label":"high"},"sources":[{"source":"osv","source_id":"GHSA-vwm4-62gf-x745","url":"https://osv.dev/vulnerability/GHSA-vwm4-62gf-x745"}],"summary":"Oj: Use-After-Free in Oj::Parser array_class/hash_class GC Marking"}