{"action":"Upgrade json to 2.21.2 or later.","affected":[{"fixed":"2.21.2","introduced":"2.20.0"}],"component":"json","cve_ids":["CVE-2026-71847"],"ecosystem":"RubyGems","epss":0.00428,"exploited":false,"fixed_versions":["2.21.2"],"ghsa_id":"GHSA-9hj4-r449-hfvc","id":"tcs_01M5KEJCYM9GSZRYXSDJFTPR9P","modified_at":"2026-09-10T03:51:13.782635464Z","published_at":"2026-08-07T18:33:12Z","references":["https://osv.dev/vulnerability/GHSA-9hj4-r449-hfvc","https://github.com/ruby/json/security/advisories/GHSA-9hj4-r449-hfvc","https://github.com/ruby/json"],"severity":{"label":"low"},"sources":[{"source":"osv","source_id":"GHSA-9hj4-r449-hfvc","url":"https://osv.dev/vulnerability/GHSA-9hj4-r449-hfvc"}],"summary":"Ruby JSON: JSON::ResumableParser#partial_value dereferences a freed input buffer and crashes on truncated duplicate-key streams"}