{"id":"CVE-2020-22083","aliases":["GHSA-j66q-qmrc-89rx","PYSEC-2020-49"],"url":"https://o3.security/vulnerability/CVE-2020-22083","summary":"jsonpickle unsafe deserialization","details":"jsonpickle through 1.4.1 allows remote code execution during deserialization of a malicious payload through the decode() function. Note: It has been argued that this is expected and clearly documented behaviour. pickle is known to be capable of causing arbitrary code execution, and must not be used with un-trusted data","published":"2020-12-17T16:15:12.610Z","modified":"2026-10-20T10:52:14.349638946Z","cvss":{"score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":1,"affectedPackages":[{"ecosystem":"PyPI","name":"jsonpickle","fixedVersion":null}],"fix":null,"references":[{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2020-22083"},{"type":"ADVISORY","url":"https://gist.github.com/j0lt-github/bb543e77a1a10c33cb56cf23d0837874"},{"type":"ADVISORY","url":"https://github.com/j0lt-github/python-deserialization-attack-payload-generator"},{"type":"ADVISORY","url":"https://github.com/jsonpickle/jsonpickle/issues/332"},{"type":"ADVISORY","url":"https://github.com/jsonpickle/jsonpickle/issues/332#issuecomment-747807494"},{"type":"EVIDENCE","url":"https://versprite.com/blog/application-security/into-the-jar-jsonpickle-exploitation/"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2020-22083"},{"type":"WEB","url":"https://github.com/jsonpickle/jsonpickle/issues/335"},{"type":"PACKAGE","url":"https://github.com/jsonpickle/jsonpickle"},{"type":"WEB","url":"https://github.com/pypa/advisory-database/tree/main/vulns/jsonpickle/PYSEC-2020-49.yaml"},{"type":"WEB","url":"https://versprite.com/blog/application-security/into-the-jar-jsonpickle-exploitation"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-20T10:52:14.349638946Z"}}