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CVE-2026-54527

CRITICAL Exploitation: PoC
9.3
CVSS 4.0
Description
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.

Metadata

CVE ID
CVE-2026-54527
State
PUBLISHED
Assigner
GitHub_M
Reserved
2026-06-15 18:40 UTC
Published
2026-07-08 21:03 UTC
Last updated
2026-07-09 14:16 UTC
Primary CWE
CWE-79
CWE-79: Improper Neutralization of Input During Web Page Gen…
Vendor / Product
jupyterlab / jupyterlab-git
Sources
cve.org  ·  NVD

Severity & Metrics

9.3 CRITICAL CVSS 4.0
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
SSVC — CISA Coordinator
Exploitation
PoC
Automatable
no
Tech. Impact
partial
Affected products (1)
VendorProductPlatformVersions
jupyterlab jupyterlab-git — >= 0.30.0b3, < 0.54.0
Weakness (CWE)
CWESourceDescription
CWE-79 cna CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVSS scores (1)
ScoreSeverityVersionSourceVector
9.3 CRITICAL 4.0 cna 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
References (3)
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