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A remote attacker can exploit this vulnerability by crafting and sending malicious JSON payloads. When these payloads, which contain specially crafted py/repr objects, are deserialized, they can trigger the execution of arbitrary Python commands and system commands. This can lead to arbitrary code execution on the affected system." } ], "metrics": [ { "other": { "content": { "namespace": "https://access.redhat.com/security/updates/classification/", "value": "Critical" }, "type": "Red Hat severity rating" } }, { "cvssV3_1": { "attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1" }, "format": "CVSS" } ], "problemTypes": [ { "descriptions": [ { "cweId": "CWE-502", "description": "Deserialization of Untrusted Data", "lang": "en", "type": "CWE" } ] } ], "references": [ { "tags": [ "vdb-entry", "x_refsource_REDHAT" ], "url": "https://access.redhat.com/security/cve/CVE-2021-47952" }, { "name": "RHBZ#2478170", "tags": [ "issue-tracking", "x_refsource_REDHAT" ], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2478170" }, { "tags": [ "x_sadp-csaf-vex" ], "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-47952.json" } ], "timeline": [ { "lang": "en", "time": "2026-05-16T16:01:30.205Z", "value": "Reported to Red Hat." }, { "lang": "en", "time": "2026-05-16T15:26:06.248Z", "value": "Made public." } ], "title": "python-jsonpickle: python-jsonpickle: Arbitrary Code Execution via Malicious JSON Deserialization", "x_adpType": "supplier", "x_generator": { "engine": "sadp-cli 1.0.0" }, "providerMetadata": { "orgId": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "shortName": "redhat-SADP", "dateUpdated": "2026-06-27T05:17:24.569Z" } } ] } }