TI-2025-01690 Aliases CVE-2025-1945 GHSA-w8jq-xcqf-f792

picklescan - Zip Flag Bit Exploit Crashes Picklescan But Not PyTorch

MEDIUM 63CWE-345Published 2025-03-10 · Updated 2025-12-29

Key facts

Attack vector: Network
Privileges required: None
User interaction: Passive
Attack complexity: Low
Attack requirements: None
Impact type: Security bypass
Confidentiality · integrity · availability: None · Low · Low
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-345.

Summary

picklescan before 0.0.23 fails to detect malicious pickle files inside PyTorch model archives when certain ZIP file flag bits are modified. By flipping specific bits in the ZIP file headers, an attacker can embed malicious pickle files that remain undetected by PickleScan while still being successfully loaded by PyTorch's torch.load(). This can lead to arbitrary code execution when loading a compromised model.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00554 46th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix Fixed picklescan (mmaitre314): 0.0.23picklescan (PyPI): 0.0.23

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: Yes
Technical impact: Partial

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	0.0.1 to before 0.0.23	0.0.23	Patch available	CNA
—	picklescan (PyPI)	before 0.0.23	0.0.23	Patch available	GHSA-w8jq-xcqf-f792

picklescan Vendorpicklescan Affected 0.0.1 to before 0.0.23 Fixed in 0.0.23 Patch available CNA
picklescan (PyPI) Vendor— Affected before 0.0.23 Fixed in 0.0.23 Patch available GHSA-w8jq-xcqf-f792

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:mmaitre314:picklescan::::::::	before 0.0.23	Vulnerable	picklescan

cpe:2.3:a:mmaitre314:picklescan:*:*:*:*:*:*:*:* Versions before 0.0.23 Vulnerable ·picklescan

Remediation

Fix · CNA picklescan (mmaitre314) Fixed in 0.0.23
Fix · GHSA-w8jq-xcqf-f792 picklescan (PyPI) Fixed in 0.0.23 Advisory →

Fixed in the same release

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

Release · 2025-03-10
mmaitre314 picklescan 0.0.23
2 records Highest priority Priority MEDIUM 2 MEDIUM
Other records, highest priority first
- TI-2025-01689 picklescan ZIP archive manipulation attack leads to crashPriority MEDIUM 63
Show all 2 records →

Timeline

2026-10-02 Threatist record created from CVE-2025-1945
2026-10-03 Alias added: GHSA-w8jq-xcqf-f792

References

Exploit 1

https://github.com/mmaitre314/picklescan/security/advisories/GHSA-w8jq-xcqf-f792

Patch 1

https://github.com/mmaitre314/picklescan/commit/e58e45e0d9e091159c1554f9b04828bbb40b9781

Advisory 2

Other 3

TI-2025-09324 PickleScan Bypasses Unsafe Globals Check Using Submodule Imports CVSS 4.0CRITICAL 9.3
TI-2025-09323 PickleScan Security Bypass via Bad CRC in ZIP Archive CVSS 4.0CRITICAL 9.3
TI-2025-09322 PickleScan Security Bypass Using Misleading File Extension CVSS 4.0CRITICAL 9.3
TI-2026-40669 picklescan - Arbitrary File Creation via logging.FileHandler Deserialization CVSS 4.0MEDIUM 6.9
TI-2025-43498 picklescan - Remote Code Execution via Undetected cProfile.runctx in Pickle Files CVSS 4.0HIGH 7.6
TI-2025-43477 picklescan - Arbitrary Code Execution via Undetected idlelib.pyshell.ModifiedInterpreter.runcommand CVSS 4.0HIGH 7.6

See all 11 →

Sources

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