GHSA-h5v5-8746-g7mm: jupyterlab (CVE-2026-73627)

Package	Ecosystem	Affected	Fixed in
jupyterlab	PyPI	>=4.6.0, <4.6.2 \|\| >=4.1.0, <4.5.10	4.6.2, 4.5.10

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

JupyterLab versions from 4.1.0 up to but not including 4.5.10, and from 4.6.0 up to but not including 4.6.2, let an authenticated user bypass administrator lock rules on the plugin manager. The bypass works by sending direct requests to the plugin API, affecting child plugins of multi-plugin extensions and cases where "lock all" was set, which can allow circumvention of restrictions implemented through locked plugins. Upgrade to JupyterLab 4.5.10 or 4.6.2.

Written 1 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
6.0	Medium	4.0	CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N	CNA (VulnCheck)

CISA KEV Not listed.
EPSS 0.0042, the 36th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

31 Oct 2026, 14:09 UTC First seen by agentprime
31 Oct 2026, 14:09 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.