{"id":"CVE-2026-16723","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-16723","summary":"fastjson has a remote code execution (RCE) vulnerability","details":"A remote code execution (RCE) vulnerability exists in fastjson 1.2.68 through 1.2.83. This vulnerability is exploitable under fastjson's stock default configuration — no AutoType enablement required, no classpath gadget required.","published":"2026-07-23T09:32:01Z","modified":"2026-08-12T21:26:55.479798303Z","cvss":{"score":9,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H"},"epss":{"score":0.15989,"percentile":0.96678,"asOf":"2026-09-04"},"cisaKev":null,"exploitsKnown":3,"affectedPackages":[{"ecosystem":"Maven","name":"com.alibaba:fastjson","fixedVersion":null}],"fix":null,"references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-16723"},{"type":"PACKAGE","url":"https://github.com/alibaba/fastjson2"},{"type":"WEB","url":"https://github.com/alibaba/fastjson2/wiki/Security-Advisory:-Remote-Code-Execution-in-fastjson-1.2.68%E2%80%931.2.83"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T21:26:55.479798303Z"}}