---
title: "CVE-2024-39205: pyload-ng vulnerable to RCE with js2py sandbox escape"
url: https://erroneo.us/security/cve/CVE-2024-39205/
description: "CVE-2024-39205 (pyload-ng (PyPI)): An issue in pyload-ng v0.5.0b3.dev85 running under python3.11 or below allows attackers to execute arbitrary code via a…"
type: vulnerability-record
section: "Security Digest"
date_published: 2024-10-28
date_modified: 2024-10-30
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2024-39205"
kev: false
cvss: 9.3
epss: 0.16538
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2024-39205: pyload-ng vulnerable to RCE with js2py sandbox escape

**Signal:** High exploit likelihood. EPSS ranks it in the top 5% of all CVEs for likely exploitation in the next 30 days. (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 16.5% , percentile 97: FIRST’s model estimates a 16.5% chance of exploitation activity in the next 30 days, higher than 97% of all scored CVEs (very high). 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 pyload-ng (PyPI) <= 0.5.0b3.dev85, no fixed version listed . Check your lockfile, including transitive dependencies.

## What it is

An issue in pyload-ng v0.5.0b3.dev85 running under python3.11 or below allows attackers to execute arbitrary code via a crafted HTTP request.

## Affected packages

- PyPI `pyload-ng` <= 0.5.0b3.dev85 → fixed: none listed

## Affected products (CVE record)

- n/a n/a: see advisory

## Severity

- CISA-ADP CVSS 3.1: 9.8 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`
- 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 yes , technical impact total .
- FIRST EPSS (model of 2026-10-21): 16.54% probability of exploitation activity in the next 30 days; percentile 97.

## Sources

- [GitHub Advisory GHSA-r9pp-r4xf-597r](https://github.com/advisories/GHSA-r9pp-r4xf-597r)
- [CVE.org record CVE-2024-39205](https://www.cve.org/CVERecord?id=CVE-2024-39205)
- [NVD entry CVE-2024-39205](https://nvd.nist.gov/vuln/detail/CVE-2024-39205)
- [github.com](https://github.com/pyload/pyload)
- [github.com](https://github.com/pyload/pyload/security/advisories/GHSA-r9pp-r4xf-597r)
- [github.com](https://github.com/Marven11/CVE-2024-39205-Pyload-RCE/tree/main)
- [github.com](https://github.com/Marven11/CVE-2024-28397-js2py-Sandbox-Escape)
- [github.com](https://github.com/advisories/GHSA-h95x-26f3-88hr)

---
Source page: https://erroneo.us/security/cve/CVE-2024-39205/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt