{"action":"Upgrade oj to 3.17.3 or later.","affected":[{"fixed":"3.17.3","introduced":"0"}],"component":"oj","cve_ids":["CVE-2026-54898"],"ecosystem":"RubyGems","epss":0.00146,"exploited":false,"fixed_versions":["3.17.3"],"ghsa_id":"GHSA-q2gm-54r6-8fwm","id":"tcs_01M5KEMRDBKVQAS866ZG28G20F","modified_at":"2026-09-10T03:51:09.344545084Z","published_at":"2026-06-19T19:36:54Z","references":["https://osv.dev/vulnerability/GHSA-q2gm-54r6-8fwm","https://github.com/ohler55/oj/security/advisories/GHSA-q2gm-54r6-8fwm","https://github.com/ohler55/oj"],"severity":{"label":"high"},"sources":[{"source":"osv","source_id":"GHSA-q2gm-54r6-8fwm","url":"https://osv.dev/vulnerability/GHSA-q2gm-54r6-8fwm"}],"summary":"Oj: Use-After-Free in Oj::Parser SAJ Callback via Input Mutation"}