CVE-2025-71349 | picklescan before 0.0.29 fails to detect the built-in trace.… | CVSS 8.1 HIGH

Description

picklescan before 0.0.29 fails to detect the built-in trace.Trace.run function when analyzing pickle files, allowing attackers to embed undetected malicious code. Remote attackers can craft malicious pickle files using trace.Trace.run in the reduce method to achieve arbitrary code execution when pickle.load processes the file.

Metadata

CVE ID: CVE-2025-71349
State: PUBLISHED
Assigner: VulnCheck
Reserved: 2026-06-20 12:48 UTC
Published: 2026-06-30 22:08 UTC
Last updated: 2026-07-01 14:05 UTC
Primary CWE: CWE-502
Deserialization of Untrusted Data
Vendor / Product: picklescan / picklescan
Sources: cve.org · NVD

Severity & Metrics

8.1 HIGH CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

SSVC — CISA Coordinator

Exploitation: PoC
Automatable: no
Tech. Impact: partial

Affected products (1)

Vendor	Product	Platform	Versions
picklescan	picklescan	—	0 < 0.0.29, 0.0.29

Weakness (CWE)

CWE	Source	Description
CWE-502	cna	Deserialization of Untrusted Data

CVSS scores (2)

Score	Severity	Version	Source	Vector
8.1	HIGH	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
7.6	HIGH	4.0	cna	CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

References (2)

GitHub Security Advisory (GHSA-5qwp-399c-mjwf) https://github.com/mmaitre314/picklescan/security/advisories/GHSA-5qwp-399c-mjwf
VulnCheck Advisory: picklescan - Arbitrary Code Execution via Undetected trace.Trace.run in Pickle Files https://www.vulncheck.com/advisories/picklescan-arbitrary-code-execution-via-undetected-trace-trace-run-in-pickle-files