---
title: "CVE-2025-10155: Picklescan Bypass is Possible via File Extension Mismatch"
url: https://erroneo.us/security/cve/CVE-2025-10155/
description: "CVE-2025-10155 (picklescan (PyPI)): An Improper Input Validation vulnerability in the scanning logic of mmaitre314 picklescan versions up to and including…"
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-2025-10155"
kev: false
cvss: 9.3
epss: 0.00847
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2025-10155: Picklescan Bypass is Possible via File Extension Mismatch

**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 0.8% , percentile 58: FIRST’s model estimates a 0.8% chance of exploitation activity in the next 30 days, higher than 58% 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 Input Validation vulnerability in the scanning logic of mmaitre314 picklescan versions up to and including 0.0.30 allows a remote attacker to bypass pickle files security checks by supplying a standard pickle file with a PyTorch-related file extension. When the pickle 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): 0.85% probability of exploitation activity in the next 30 days; percentile 58.

## Sources

- [Proof of Concept Instructions (GHSA)](https://github.com/mmaitre314/picklescan/security/advisories/GHSA-jgw4-cr84-mqxg)
- [GitHub Advisory GHSA-jgw4-cr84-mqxg](https://github.com/advisories/GHSA-jgw4-cr84-mqxg)
- [CVE.org record CVE-2025-10155](https://www.cve.org/CVERecord?id=CVE-2025-10155)
- [NVD entry CVE-2025-10155](https://nvd.nist.gov/vuln/detail/CVE-2025-10155)
- [Vulnerable Code](https://github.com/mmaitre314/picklescan/blob/58983e1c20973ac42f2df7ff15d7c8cd32f9b688/src/picklescan/scanner.py#L463)
- [github.com](https://github.com/mmaitre314/picklescan/commit/28a7b4ef753466572bda3313737116eeb9b4e5c5)
- [github.com](https://github.com/pypa/advisory-database/tree/main/vulns/picklescan/PYSEC-2025-151.yaml)

---
Source page: https://erroneo.us/security/cve/CVE-2025-10155/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt