CVE-2025-71339 | Picklescan before 0.0.33 fails to detect the numpy.f2py.crac… | CVSS 8.1 HIGH

Description

Picklescan before 0.0.33 fails to detect the numpy.f2py.crackfortran._eval_length gadget in pickle __reduce__ methods, allowing arbitrary code execution. Attackers can craft malicious pickle files that execute arbitrary Python code when loaded by victims who trust Picklescan's safety validation.

Metadata

CVE ID: CVE-2025-71339
State: PUBLISHED
Assigner: VulnCheck
Reserved: 2026-06-20 01:48 UTC
Published: 2026-06-22 21:04 UTC
Last updated: 2026-06-22 21:04 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

Affected products (1)

Vendor	Product	Platform	Versions
Picklescan	Picklescan	—	0 < 0.0.33, 0.0.33

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-6556-fwc2-fg2p) https://github.com/mmaitre314/picklescan/security/advisories/GHSA-6556-fwc2-fg2p
VulnCheck Advisory: Picklescan - Arbitrary Code Execution via numpy.f2py.crackfortran._eval_length Gadget https://www.vulncheck.com/advisories/picklescan-arbitrary-code-execution-via-numpy-f2py-crackfortran-eval-length-gadget