CVE-2025-71339 | THREATINT

Description

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.

PUBLISHED Reserved 2026-06-20 | Published 2026-06-22 | Updated 2026-06-23 | Assigner VulnCheck

HIGH: 7.6CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

HIGH: 8.1CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

Problem types

Deserialization of Untrusted Data

Product status

Default status

unaffected

Any version before 0.0.33

affected

0.0.33 (semver)

unaffected

Credits

ac0d3r reporter

Lyutoon reporter

References

github.com/...lescan/security/advisories/GHSA-6556-fwc2-fg2p exploit

github.com/...lescan/security/advisories/GHSA-6556-fwc2-fg2p (GitHub Security Advisory (GHSA-6556-fwc2-fg2p)) vendor-advisory

www.vulncheck.com/...py-f2py-crackfortran-eval-length-gadget (VulnCheck Advisory: Picklescan - Arbitrary Code Execution via numpy.f2py.crackfortran._eval_length Gadget) third-party-advisory

cve.org (CVE-2025-71339)

nvd.nist.gov (CVE-2025-71339)

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