---
title: "CVE-2025-10156: Picklescan: ZIP archive scan bypass is possible through non-exhaustive Cyclic Redundancy Check"
url: https://erroneo.us/security/cve/CVE-2025-10156/
description: "CVE-2025-10156 (picklescan (PyPI)): An Improper Handling of Exceptional Conditions vulnerability in the ZIP archive scanning component of mmaitre314…"
type: vulnerability-record
section: "Security Digest"
date_published: 2025-09-17
date_modified: 2026-06-06
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2025-10156"
kev: false
cvss: 9.3
epss: 0.01481
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2025-10156: Picklescan: ZIP archive scan bypass is possible through non-exhaustive Cyclic Redundancy Check

**Signal:** Critical and remotely reachable. No known exploitation yet, but it is network-reachable without credentials. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Not in CISA KEV , but CISA’s SSVC assessment records a public proof-of-concept, so attack code exists.
- EPSS 1.5% , percentile 74: FIRST’s model estimates a 1.5% chance of exploitation activity in the next 30 days, higher than 74% of all scored CVEs (moderate). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes picklescan (PyPI) <= 0.0.30, fixed in 0.0.31 . Check your lockfile, including transitive dependencies.

## What it is

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.

## Affected packages

- PyPI `picklescan` <= 0.0.30 → fixed: 0.0.31

## Affected products (CVE record)

- mmaitre314 picklescan: <= 0.0.30

## Severity

- JFROG CVSS 4.0: 9.3 `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`
- GitHub CVSS 4.0: 9.3 `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`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation poc , automatable no , technical impact partial .
- FIRST EPSS (model of 2026-10-21): 1.48% probability of exploitation activity in the next 30 days; percentile 74.

## Sources

- [github.com](https://github.com/mmaitre314/picklescan/security/advisories/GHSA-mjqp-26hc-grxg)
- [GitHub Advisory GHSA-mjqp-26hc-grxg](https://github.com/advisories/GHSA-mjqp-26hc-grxg)
- [CVE.org record CVE-2025-10156](https://www.cve.org/CVERecord?id=CVE-2025-10156)
- [NVD entry CVE-2025-10156](https://nvd.nist.gov/vuln/detail/CVE-2025-10156)
- [Proof of Concept (Archive with Bad CRC)](https://huggingface.co/jinaai/jina-embeddings-v2-base-en/resolve/main/pytorch_model.bin?download=true)
- [Example of Failing Scan on Hugging Face](https://huggingface.co/jinaai/jina-embeddings-v2-base-en/tree/main)
- [Vulnerable Code Snippet](https://github.com/mmaitre314/picklescan/blob/v0.0.29/src/picklescan/relaxed_zipfile.py#L35)
- [github.com](https://github.com/mmaitre314/picklescan/commit/28a7b4ef753466572bda3313737116eeb9b4e5c5)
- [github.com](https://github.com/pypa/advisory-database/tree/main/vulns/picklescan/PYSEC-2025-152.yaml)

---
Source page: https://erroneo.us/security/cve/CVE-2025-10156/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt