CVE-2025-1945: Zip Flag Bit Exploit Crashes Picklescan But Not PyTorch
PickleScan 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.
References
- github.com/advisories/GHSA-w8jq-xcqf-f792
- github.com/mmaitre314/picklescan
- github.com/mmaitre314/picklescan/commit/e58e45e0d9e091159c1554f9b04828bbb40b9781
- github.com/mmaitre314/picklescan/security/advisories/GHSA-w8jq-xcqf-f792
- nvd.nist.gov/vuln/detail/CVE-2025-1945
- sites.google.com/sonatype.com/vulnerabilities/cve-2025-1945
Detect and mitigate CVE-2025-1945 with GitLab Dependency Scanning
Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Learn more about Dependency Scanning →