CRITICAL 9.8

PYSEC-2025-21

Details

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.

Are you affected?

Enter the version of the package you're using.

Affected packages

PyPI / picklescan

Introduced in: 0 Fixed in: e58e45e0d9e091159c1554f9b04828bbb40b9781

Fix pip install --upgrade 'picklescan>=e58e45e0d9e091159c1554f9b04828bbb40b9781'

References

https://github.com/mmaitre314/picklescan/security/advisories/GHSA-w8jq-xcqf-f792 [EVIDENCE]
https://sites.google.com/sonatype.com/vulnerabilities/cve-2025-1945 [WEB]
https://github.com/mmaitre314/picklescan/commit/e58e45e0d9e091159c1554f9b04828bbb40b9781 [FIX]