P4Verified

CVE-2026-67338: jupyterlab 0 to before 4.5.9

CVE-2026-67338. CVSS 3.1 base score 6.1 (MEDIUM, Vendor/CNA). EPSS 0.00305 (percentile 0.21233), scored 2026-10-06.

Affected technology

jupyterlab · 0 to before 4.5.9
jupyterlab

Description’s affected range: before 4.5.9

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 4.0): Network (remote) · Low privileges required · Passive user interaction

What an attacker can do

Attackers can publish malicious PyPI packages with javascript: URLs in project metadata that execute arbitrary JavaScript in the JupyterLab origin when users click the extension name. Vendor/CNA’s CVSS 4.0 assessment (base score 5.1/10) rates confidentiality, integrity and availability impact as none.

Published 2026-10-08 17:35:04.742476+00:00

CWE: CWE-84
CCR priority: 24.5 /100 (P4)
CVSS 3.1: 6.1 /10 · CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N · Vendor/CNA
EPSS: 0.00305 · percentile 0.2132 · 2026-10-08
KEV: no

Provenance

FIRST EPSS daily exploit-probability · Source record · observed 2026-10-08 17:36:22.845483+00:00 UTC
NVD CVE API 2.0 · Source record · observed 2026-10-08 17:32:11.049884+00:00 UTC

Stable permalink: https://cybercodered.org/item/cve-cve-2026-67338.html