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CVE-2026-73627: jupyterlab

CVSS: 6.0v4.0MediumAwaiting analysis
AliasesGHSA-h5v5-8746-g7mmBIT-jupyterlab-2026-73627UBUNTU-CVE-2026-73627
Published 13-08-2026Last modified 30-09-2026
Open JSON

Vulnerability summary

CVE-2026-73627 is a medium (CVSS 6.0) vulnerability in jupyterlab. EPSS estimates a 0.42% chance of exploitation in the next 30 days, higher than 35% of scored vulnerabilities.

Overall risk
24/100
0100
Low · default modelHow is this calculated?
CVSS score
6.0/10
010
Medium · v4.0 (CVE.org)
EPSS score
0.42%
0%100%
Low · +0.17 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 1 · Related 1
OPENSUSE-SU-2026:11634-1

Timeline

  1. 13-08-2026
    PublishedVulnerability first disclosed.
  2. 30-09-2026
    Last modifiedVulnerability information updated.

Description

JupyterLab (pip package 'jupyterlab') versions >=4.1.0,<=4.5.9 and >=4.6.0,<=4.6.1 contain a plugin manager lock-rule enforcement bypass. Two server-side enforcement gaps allow an authenticated user to circumvent administrator lock rules by making direct requests to the /lab/api/plugins endpoint, enabling or disabling plugins that were locked — including child plugins of multi-plugin extensions and plugins locked via the 'lock all' mechanism. This can impact data integrity and bypass hardening or restrictions (e.g., download/upload limits) implemented through locked plugins. Fixed in versions 4.6.2 and 4.5.10.

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.42%

Chance of exploitation in the next 30 days

Percentile

35%

Versus all other CVEs

30-day change

+0.17 pp

From 0.25% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.42%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Debian1 product
  • jupyterlabAll versions (No fix recorded) | < 4.4.10+ds1+~3.1.0+~0.16.6+~cs1.4.4-4
Jupyterlab1 product
  • jupyterlab≥ 4.6.0, ≤ 4.6.1 | ≥ 4.1.0, ≤ 4.5.9
PyPI1 product
  • jupyterlab≥ 4.6.0, < 4.6.2 | ≥ 4.1.0, < 4.5.10
Ubuntu1 product
  • jupyterlabAll versions (No fix recorded)

4 vendors · 4 products

References

13 links
Show all 13 references