CVE-2024-39700

CRITICAL 2 PoCs
INFO Priority: 0.11 BB Relevance: 80/100
Published: 2024-07-16 Modified: 2026-11-04 First seen: 2026-11-03 Status: active

Attack Surface

Network Low Complexity No Interaction Conf. Impact Integ. Impact Scope Change

CVSS Vector Breakdown

AV: Network
AC: Low
PR: Low
UI: None
S: Changed
C: High
I: High
A: High

Description

JupyterLab extension template is a `copier` template for JupyterLab extensions. Repositories created using this template with `test` option include `update-integration-tests.yml` workflow which has an RCE vulnerability. Extension authors hosting their code on GitHub are urged to upgrade the template to the latest version. Users who made changes to `update-integration-tests.yml`, accept overwriting of this file and re-apply your changes later. Users may wish to temporarily disable GitHub Actions while working on the upgrade. We recommend rebasing all open pull requests from untrusted users as actions may run using the version from the `main` branch at the time when the pull request was created. Users who are upgrading from template version prior to 4.3.0 may wish to leave out proposed changes to the release workflow for now as it requires additional configuration.

Affected Software (3)

VendorProductVersion
jupyter jupyterlab < 4.3.0
jupyterlab extension-template < 4.3.3
jupyterlab extension-template < 4.3.3

Bug Bounty Relevance

80 / 100
✓ Network accessible
✓ Low complexity
✓ No user interaction
✓ PoC available (2)

CVSS Score

10.0 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

EPSS — Exploitation Probability

1.09%
Raw Score 0.010920
Percentile 66.0%
Date 2026-11-14

EPSS Trend

2026-11-14
0.01092
2026-11-13
0.01092
2026-11-12
0.01092
2026-11-10
0.01092
2026-11-09
0.01092
2026-11-08
0.01092
2026-11-07
0.01092
2026-11-06
0.01092
2026-11-05
0.01092
2026-11-04
0.01092
2026-11-03
0.01092

Intelligence Sources

mitre ref →
nvd ref →