{"action":"Upgrade oj to 3.17.2 or later.","affected":[{"fixed":"3.17.2","introduced":"0"}],"component":"oj","cve_ids":["CVE-2026-54899"],"ecosystem":"RubyGems","epss":0.00407,"exploited":false,"fixed_versions":["3.17.2"],"ghsa_id":"GHSA-2cw7-v8ff-p88r","id":"tcs_01M5KEFXM92P8PJ10TR5QBS426","modified_at":"2026-10-06T20:00:05.191640486Z","published_at":"2026-06-19T19:34:30Z","references":["https://osv.dev/vulnerability/GHSA-2cw7-v8ff-p88r","https://github.com/ohler55/oj/security/advisories/GHSA-2cw7-v8ff-p88r","https://nvd.nist.gov/vuln/detail/CVE-2026-54899","https://github.com/ohler55/oj","https://github.com/rubysec/ruby-advisory-db/blob/master/gems/oj/CVE-2026-54899.yml","https://www.cve.org/CVERecord/SearchResults?query=CVE-2026-54899"],"severity":{"label":"medium","score":6.3},"sources":[{"source":"osv","source_id":"GHSA-2cw7-v8ff-p88r","url":"https://osv.dev/vulnerability/GHSA-2cw7-v8ff-p88r"},{"source":"nvd","source_id":"CVE-2026-54899","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-54899"}],"summary":"Oj: Use-After-Free in Oj::Parser Symbol Key Cache Toggle"}