CVE-2021-47952
📛 CVE Title
(no title)
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 system commands and arbitrary code.
Overview
- State
- —
- Assigner (CNA)
- —
- CVSS severity
- critical
- CVSS score
- 9.8 / 10
- CVSS vector
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H- Effective score
- 9.8 / 10 CRITICAL source: CNA overview
- CWE(s)
- —
- Reserved
- —
- Published
- —
- Last updated
- —
- Source
- https://www.tenable.com/cve/CVE-2021-47952
- Linked Threat
- CVE-2021-47952 — CVE-2021-47952
NVD triage scoring NVD CVE 2.0
Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.
- NVD published
- 2026-05-16 16:16:21 UTC
- NVD last modified
- 2026-05-18 20:16:36 UTC
- NVD CVSS v3.1
- 9.8 / 10 CRITICAL source: disclosure@vulncheck.com
- NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H- Exploitability subscore
- 3.9 / 10
- Impact subscore
- 5.9 / 10
- EPSS score
- 0.0040 (probability of exploitation in next 30 days)
- EPSS percentile
- 60.85% vs all CVEs — higher = more likely to be exploited, as of 2026-05-24
NVD-assigned CWE(s):
CWE-94
(differs from the CNA list above)
NVD / KEV / EPSS data refreshed 2026-05-25 00:06 UTC. Re-run the 🛰 Backfill from NVD button above to refresh.
European Union Vulnerability Database ENISA EUVD
ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.
- EUVD ID
-
EUVD-2021-34842 - Assigner
- VulnCheck
- Published
- May 16, 2026, 3:26:06 PM
- Updated
- May 26, 2026, 11:51:43 AM
- EUVD base score (CVSS 4.0)
-
9.3 / 10
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 - EUVD-reported EPSS
- 0.4000
- Vendors
- Jsonpickle
- Products
-
python jsonpickle (2.0.0)
- Aliases
-
GHSA-gv3j-fjgf-469v
ENISA 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.
Vendor references (0)
References embedded in the original CVE record by the assigning CNA.
None in the CVE record.
Web references (7)
DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.
- https://github.com/jsonpickle/jsonpickle tenable:github.com
- https://jsonpickle.github.io tenable:jsonpickle.github.io
- https://nvd.nist.gov/vuln/detail/CVE-2021-47952 tenable:nvd.nist.gov
- https://www.cve.org/CVERecord?id=CVE-2021-47952 tenable:www.cve.org
- https://www.exploit-db.com/exploits/49585 tenable:www.exploit-db.com
- https://www.first.org/epss/ tenable:www.first.org
- https://www.vulncheck.com/advisories/python-jsonpickle-remote-code-execution-via-py-repr tenable:www.vulncheck.com
NVD-tagged references (4)
Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.
- https://github.com/jsonpickle/jsonpickle disclosure@vulncheck.com
- https://jsonpickle.github.io disclosure@vulncheck.com
- https://www.exploit-db.com/exploits/49585 disclosure@vulncheck.com
- https://www.vulncheck.com/advisories/python-jsonpickle-remote-code-execution-via-py-repr disclosure@vulncheck.com
Remediations (10)
Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.
-
web:gemini.google.com
Meet Gemini, Google's AI assistant. Get help with writing, planning, brainstorming, and more. Experience the power of generative AI.
2026-05-26 02:55 UTC -
web:github.com
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 system commands and arbitrary code.
2026-05-26 02:55 UTC -
web:guide.sonatype.com
Technical security analysis for CVE-2021-47952 . CVSS 9.8 severity. View CVSS vectors, CWE classifications, and exploit maturity ratings.
2026-05-26 02:55 UTC -
web:learn.microsoft.com
Windows 11, version 25H2 is now available for all eligible devices. Devices running Home and Pro editions of Windows 11 that are not managed by IT departments will receive the update to Windows 11, version 25H2 through the machine learning-based intelligent rollout.
2026-05-26 02:55 UTC -
web:nvd.nist.gov
The NVD is the U.S. government repository of standards based vulnerability management data represented using the Security Content Automation Protocol (SCAP). This data enables automation of vulnerability management, security measurement, and compliance. The NVD includes databases of security checklist references, security-related software flaws, product names, and impact metrics. For ...
2026-05-26 02:55 UTC -
web:security-tracker.debian.org
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 system commands and arbitrary code. Source CVE (at NVD; CERT, ENISA, LWN ...
2026-05-26 02:55 UTC -
web:ubuntu.com
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 system commands and arbitrary code.
2026-05-26 02:55 UTC -
web:www.howtogeek.com
In this case, use your PC's built-in Windows Update troubleshooter to automatically find and fix issues with your updates. Only a little interaction is required from your end. To run that tool, go to Settings > Update & Security > Troubleshoot > Additional Troubleshooters > Windows Update and click "Run the Troubleshooter".
2026-05-26 02:55 UTC -
web:www.oracle.com
Critical Security Patch Updates Critical Security Patch Updates provide security patches for supported Oracle on-premises products. A Critical Security Patch Update provides targeted, high-priority security fixes in a smaller, more focused format, making them easier to apply with minimal disruption.
2026-05-26 02:55 UTC -
web:www.windowscentral.com
The Jan 2026 Windows 11 update is causing boot failures for some, with PCs getting stuck at startup or refusing to load the OS entirely. Here's the fix .
2026-05-26 02:55 UTC
AI Forensic Analysis
Only Available for Registered Users. Sign in to view.