Critical
jsonpickle — security advisory
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.
- Products
- jsonpickle
- Affected versions
- 0.8.0-1build1, 0.9.2-1, 0.9.5-0ubuntu1, 0.9.5-1, 1.2-1, 2.0.0+dfsg1-1, 3.0.0+dfsg1-1, 3.0.2+dfsg-1, 3.0.3+dfsg-1, 4.0.2+dfsg-1, 4.0.2+dfsg-2, 4.0.2+dfsg-3
- Fixed versions
- Not specified
- CVEs
- CVE-2021-47952
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 00:55 UTC · Revision 1
Source evidence
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.
osv:UBUNTU-CVE-2021-47952
jsonpickle
Fixed versions: Not specified
jsonpickle
Fixed versions: Not specified
jsonpickle
Fixed versions: Not specified
jsonpickle
Fixed versions: Not specified
jsonpickle
Fixed versions: Not specified
jsonpickle
Fixed versions: Not specified
jsonpickle
Fixed versions: Not specified
jsonpickle
Fixed versions: Not specified
Complete source record
{
"id": "bb92080db6e4acbdd35663efd26584b5f1a3efb46b1967e3e76497c329cd044d",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2021-47952",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2021-47952",
"summary": "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.",
"evidence": "osv:UBUNTU-CVE-2021-47952",
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"modified": "2026-10-17T12:56:16.184918101Z",
"provider": "osv",
"upstream": [
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"references": [
"https://ubuntu.com/security/CVE-2021-47952",
"https://www.cve.org/CVERecord?id=CVE-2021-47952",
"https://github.com/jsonpickle/jsonpickle",
"https://jsonpickle.github.io",
"https://www.exploit-db.com/exploits/49585",
"https://www.vulncheck.com/advisories/python-jsonpickle-remote-code-execution-via-py-repr"
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"source_id": "core-osv",
"document_id": 355093,
"published_at": "2026-05-16T16:16:00+00:00"
}