Vulnerability record · CVE-2026-54527 · published 8 July 2026

CVE-2026-54527: Jupyterlab-git cross-site scripting vulnerability

Jupyter · Jupyterlab Git

JupyterLab Git is a Git extension for JupyterLab. From 0.30.0b3 before 0.54.0, the PlainTextDiff.ts createHeader() method passes Git filenames directly to innerHTML when rendering renamed files in commit history, allowing a crafted filename to execute JavaScript when a victim views the rename diff in the Git History tab. This issue is fixed in version 0.54.0.

9.3 CVSS 4.0 Critical EPSS 0.53% · top 57.5% CWE-79 · Cross-site scripting

9.3CVSS 4.0 base score

0.53%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

4References, 2 tagged exploit

15 Jul 2026Last modified by NVD

Description

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

Jupyterlab Git Jupyter

References

Link	Tags
https://github.com/jupyterlab/jupyterlab-git/commit/c6d37b88f36aa59aee317930b95e427fb9d6b09b	Patch
https://github.com/jupyterlab/jupyterlab-git/releases/tag/v0.54.0	Release Notes
https://github.com/jupyterlab/jupyterlab-git/security/advisories/GHSA-f962-v9hr-pfg5	ExploitMitigationVendor Advisory
https://github.com/jupyterlab/jupyterlab-git/security/advisories/GHSA-f962-v9hr-pfg5	ExploitMitigationVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-54527), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.