TI-2025-43442 Aliases CVE-2025-71321 GHSA-m273-6v24-x4m4

picklescan - Arbitrary File Writing via distutils Module Bypass

HIGH 81CWE-502Published 2026-06-17 · Updated 2026-11-08

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: Code execution, Information disclosure
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-502 and CWE-552.

Summary

picklescan before 0.0.33 contains an arbitrary file writing vulnerability that allows attackers to bypass the dangerous blocklist by using distutils.file_util.write_file. Attackers can construct malicious pickle objects to overwrite critical system files and achieve denial of service or remote code execution.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00824 57th percentileScored 2026-11-07

Fix Fixed picklescan (picklescan): 0.0.33picklescan (PyPI): 0.0.33

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: Yes
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
picklescan	picklescan	before 0.0.33	0.0.33	Patch available	CNA
—	picklescan (PyPI)	before 0.0.33	0.0.33	Patch available	GHSA-m273-6v24-x4m4

picklescan Vendorpicklescan Affected before 0.0.33 Fixed in 0.0.33 Patch available CNA
picklescan (PyPI) Vendor— Affected before 0.0.33 Fixed in 0.0.33 Patch available GHSA-m273-6v24-x4m4

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:a:mmaitre314:picklescan::::::::	—	—	picklescan

cpe:2.3:a:mmaitre314:picklescan:*:*:*:*:*:*:*:* Versions — — ·picklescan

Remediation

Fix · CNA picklescan (picklescan) Fixed in 0.0.33
Fix · GHSA-m273-6v24-x4m4 picklescan (PyPI) Fixed in 0.0.33 Advisory →

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Release · 2026-06-17
picklescan 0.0.33
4 records Highest priority Priority HIGH 3 HIGH, 1 MEDIUM
Other records, highest priority first
- TI-2025-43444 picklescan - Remote Code Execution via Unblocked ctypes ModulePriority HIGH 81
- TI-2025-43441 picklescan - Remote Code Execution via Incomplete Disallowed InputsPriority HIGH 81
- TI-2025-43443 PickleScan - Unsafe Globals Check Bypass via pty.spawn FunctionPriority MEDIUM 40
Show all 4 records →

Timeline

2026-10-02 Threatist record created from CVE-2025-71321
2026-10-03 Alias added: GHSA-m273-6v24-x4m4

References

Advisory 2

Other 4

TI-2026-03009 picklescan - Universal Blocklist Bypass via pkgutil.resolve_name CVSS 4.0CRITICAL 10.0
TI-2026-40680 picklescan - Remote Code Execution via Unblocked Standard Library Modules CVSS 4.0CRITICAL 9.3
TI-2026-38870 picklescan - Arbitrary Code Execution via Obfuscated eval Call CVSS 4.0CRITICAL 9.3
TI-2026-38869 picklescan - Arbitrary Code Execution via profile.run() Blocklist Bypass CVSS 4.0CRITICAL 9.3
TI-2025-43446 picklescan - Detection Bypass via STACK_GLOBAL Opcode Parsing Logic Flaw CVSS 4.0CRITICAL 9.3
TI-2025-43444 picklescan - Remote Code Execution via Unblocked ctypes Module CVSS 4.0CRITICAL 9.3

See all 57 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences