CVE-2021-47952

9.8 CRITICAL
Published: May 16, 2026 Modified: June 27, 2026
View on NVD

Description

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.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://github.com/jsonpickle/jsonpickle
Source: disclosure@vulncheck.com
https://jsonpickle.github.io
Source: disclosure@vulncheck.com
https://www.exploit-db.com/exploits/49585
Source: disclosure@vulncheck.com
https://www.vulncheck.com/advisories/python-jsonpickle-remote-code-execution-via-py-repr
Source: disclosure@vulncheck.com
https://access.redhat.com/security/cve/CVE-2021-47952
Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
https://bugzilla.redhat.com/show_bug.cgi?id=2478170
Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-47952.json
Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c

7 reference(s) from NVD

Quick Stats

CVSS v3 Score
9.8 / 10.0
EPSS (Exploit Probability)
0.7%
48th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

CWE-94 CWE-502

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