TI-2026-03009 Aliases CVE-2026-3490 GHSA-vvpj-8cmc-gx39

picklescan - Universal Blocklist Bypass via pkgutil.resolve_name

HIGH 82CWE-183Published 2026-06-17 · Updated 2026-06-18

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: Security bypass
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-693.

Summary

picklescan before 1.0.4 fails to block pkgutil.resolve_name, allowing attackers to bypass the entire blocklist by resolving any dangerous function through indirect REDUCE calls. Remote attackers can invoke any blocked function such as os.system, builtins.exec, or subprocess.call to achieve remote code execution.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00823 57th percentileScored 2026-11-07

Fix Fixed picklescan (picklescan): 1.0.4picklescan (PyPI): 1.0.4

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 1.0.4	1.0.4	Patch available	CNA
—	picklescan (PyPI)	before 1.0.4	1.0.4	Patch available	GHSA-vvpj-8cmc-gx39

picklescan Vendorpicklescan Affected before 1.0.4 Fixed in 1.0.4 Patch available CNA
picklescan (PyPI) Vendor— Affected before 1.0.4 Fixed in 1.0.4 Patch available GHSA-vvpj-8cmc-gx39

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 1.0.4
Fix · GHSA-vvpj-8cmc-gx39 picklescan (PyPI) Fixed in 1.0.4 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 1.0.4
2 records Highest priority Priority HIGH 2 HIGH
Other records, highest priority first
- TI-2026-38869 picklescan - Arbitrary Code Execution via profile.run() Blocklist BypassPriority HIGH 81
Show all 2 records →

Timeline

2026-10-02 Threatist record created from CVE-2026-3490
2026-10-03 Alias added: GHSA-vvpj-8cmc-gx39
2026-10-25 EPSS moved to the below the 50th percentile
2026-10-27 EPSS moved to the 50th–90th percentile

References

Advisory 2

Other 1

https://github.com/mmaitre314/picklescan

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
TI-2025-43442 picklescan - Arbitrary File Writing via distutils Module Bypass 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