CVE-2025-71352

Received Received - Intake

picklescan Arbitrary Code Execution via trace.Trace.runctx

Publication date: 2026-06-30

Last updated on: 2026-06-30

Assigner: VulnCheck

Description

picklescan before 0.0.29 fails to detect the built-in Python trace.Trace.runctx function when used in pickle file reduce methods, allowing attackers to execute arbitrary code. Remote attackers can craft malicious pickle files with trace.Trace.runctx payloads that bypass picklescan detection and execute code upon pickle.load() invocation.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-06-30

Last Modified

2026-06-30

Generated

2026-07-01

AI Q&A

2026-07-01

EPSS Evaluated

N/A

NVD

CVE-2025-71352

EUVD

EUVD-2025-210387

Affected Vendors & Products

Vendor	Product	Version / Range
picklescan	picklescan	to 0.0.29 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-693	The product does not use or incorrectly uses a protection mechanism that provides sufficient defense against directed attacks against the product.

Attack-Flow Graph

Executive Summary

This vulnerability exists in picklescan versions before 0.0.29. The tool fails to detect the built-in Python function trace.Trace.runctx when it is used within pickle file reduce methods. As a result, attackers can craft malicious pickle files containing trace.Trace.runctx payloads that bypass picklescan's detection mechanisms.

When such a malicious pickle file is loaded using pickle.load(), the embedded trace.Trace.runctx function executes arbitrary code on the target system.

Impact Analysis

This vulnerability allows remote attackers to execute arbitrary code on systems that load malicious pickle files using pickle.load().

Because the malicious payload bypasses picklescan detection, it increases the risk of unauthorized code execution, potentially leading to system compromise, data theft, or disruption of services.

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