Deserialization in Picklescan
CVE-2025-71339
Picklescan before 0.0.33 fails to detect the numpy.f2py.crackfortran._eval_length gadget in pickle __reduce__ methods, allowing arbitrary code execution. Attackers can craft malicious pickle files that execute arbitrary Python code when loaded by victims who trust Picklescan's safety validation.
Vulnerability class: Insecure Deserialization
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.005 (42.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 42nd percentile — 42.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Picklescan — versions 0, 0.0.33
Weakness classification (CWE)
References
- github.com/mmaitre314/picklescan/security/advisories/GHSA-6556-fwc2-fg2p (vendor-advisory)
- www.vulncheck.com/advisories/picklescan-arbitrary-code-execution-via-numpy-f2py… (third-party-advisory)
Frequently asked questions
- What is CVE-2025-71339?
- CVE-2025-71339 is a high-severity vulnerability in Picklescan, classified under Deserialization of Untrusted Data. CVSS score: 8.1/10. Published 2026-06-22.
- How severe is CVE-2025-71339?
- High severity. CVSS v3 base score is 8.1 out of 10.