{"id":"UBUNTU-CVE-2021-47952","details":"python jsonpickle 2.0.0 contains a remote code execution vulnerability that allows attackers to execute arbitrary Python commands by deserializing malicious JSON payloads containing py/repr objects. Attackers can craft JSON strings with py/repr directives that invoke the eval function during deserialization to execute arbitrary code.","modified":"2026-06-29T13:52:00.041018125Z","published":"2026-05-16T16:16:00Z","upstream":["CVE-2021-47952"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-47952"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2021-47952"},{"type":"REPORT","url":"https://github.com/jsonpickle/jsonpickle"},{"type":"REPORT","url":"https://jsonpickle.github.io"},{"type":"REPORT","url":"https://www.exploit-db.com/exploits/49585"},{"type":"REPORT","url":"https://www.vulncheck.com/advisories/python-jsonpickle-remote-code-execution-via-py-repr"}],"affected":[{"package":{"name":"jsonpickle","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/jsonpickle?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.8.0-1build1","0.9.2-1"],"ecosystem_specific":{"binaries":[{"binary_version":"0.9.2-1","binary_name":"python-jsonpickle"},{"binary_version":"0.9.2-1","binary_name":"python3-jsonpickle"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-47952.json"}},{"package":{"name":"jsonpickle","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/jsonpickle?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.5-0ubuntu1","0.9.5-1"],"ecosystem_specific":{"binaries":[{"binary_version":"0.9.5-1","binary_name":"python-jsonpickle"},{"binary_name":"python3-jsonpickle","binary_version":"0.9.5-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-47952.json"}},{"package":{"name":"jsonpickle","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/jsonpickle?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.5-1","1.2-1"],"ecosystem_specific":{"binaries":[{"binary_name":"python3-jsonpickle","binary_version":"1.2-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-47952.json"}},{"package":{"name":"jsonpickle","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/jsonpickle?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.2-1","2.0.0+dfsg1-1"],"ecosystem_specific":{"binaries":[{"binary_name":"python3-jsonpickle","binary_version":"2.0.0+dfsg1-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-47952.json"}},{"package":{"name":"jsonpickle","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/jsonpickle?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.0.0+dfsg1-1","3.0.2+dfsg-1","3.0.3+dfsg-1"],"ecosystem_specific":{"binaries":[{"binary_name":"python3-jsonpickle","binary_version":"3.0.3+dfsg-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-47952.json"}},{"package":{"name":"jsonpickle","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/jsonpickle?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.0.2+dfsg-1","4.0.2+dfsg-2"],"ecosystem_specific":{"binaries":[{"binary_name":"python3-jsonpickle","binary_version":"4.0.2+dfsg-2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-47952.json"}},{"package":{"name":"jsonpickle","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/jsonpickle?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.0.2+dfsg-2"],"ecosystem_specific":{"binaries":[{"binary_name":"python3-jsonpickle","binary_version":"4.0.2+dfsg-2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-47952.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"},{"type":"Ubuntu","score":"medium"}]}