CVE-2025-1945

picklescan - Zip Flag Bit Exploit Crashes Picklescan But Not PyTorch

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.

Affected

mmaitre314 · picklescan

CVSS v4.0 CNA

5.3 MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:L/SC:N/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v4.0 GitHub

5.3 MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

CVSS v3.1 NVD

9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

0.55% chance of exploitation in the next 30 days, 45th percentile

Published

2025-03-10

Updated

2025-12-29

Proof-of-concept exploits (2)

• mmaitre314/picklescan/security/advisories/GHSA-w8jq-xcqf-f792
• advisories/GHSA-w8jq-xcqf-f792

Security advisories

• mmaitre314/picklescan/commit/e58e45e0d9e091159c1554f9b04828bbb40b9781

References

• CVE Record
• NVD entry