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.
CVE-2025-1945
This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 0.9%, top 24% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
- High severity, but no confirmed exploitation yet
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 9.8
- EG Score
- 9.8(medium)
- EG Risk
- —
- EPSS
- 40.5%
- KEV
- Not listed
Published
March 10, 2025
Last Modified
December 29, 2025
Advisory Details (3)
Auto-updated Jun 29, 2026CVE-2025-1945 | Sonatype Security Advisory
https://www.sonatype.com/security-advisories/cve-2025-1945Zip Flag Bit Exploit Crashes Picklescan But Not PyTorch · Advisory · mmaitre314/picklescan · GitHub
https://github.com/mmaitre314/picklescan/security/advisories/GHSA-w8jq-xcqf-f792commit e58e45e0d9e0 (mmaitre314/picklescan)
Patch available: mmaitre314/picklescan v0.0.23 (contains commit e58e45e0d9e0)
https://github.com/mmaitre314/picklescan/commit/e58e45e0d9e091159c1554f9b04828bbb40b9781Affected Packages
(1 across 1 ecosystem)
PyPI(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| picklescan | 0.0.1 ... 0.0.9 (22 versions) | 0.0.23 | — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 10× in last 7d / 43× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
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- 2026-05-30 09:53 UTCEG score recompute
- 2026-05-29 16:20 UTCOSV refresh
- 2026-05-29 13:44 UTCEPSS rescore
Frequently asked(5)
What is CVE-2025-1945?
When was CVE-2025-1945 disclosed?
Is CVE-2025-1945 actively exploited?
What is the CVSS score of CVE-2025-1945?
How do I remediate CVE-2025-1945?
Dependency Blast Radius
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