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CVE-2026-54527

JupyterLab Git: Stored XSS leading to RCE

Published: Jul 8, 2026Updated: Jul 15, 2026 Sources: CVE List NVDCWE-79
9.0CRITICAL
NVD MITRE
EPSS Score
0.4%
Top 71.2%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
Not available

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:RS:CC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:RUser Interaction
Required
Scope
S:CScope
Changed
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-79

Affected Products

jupyter
oss-projectaka jupyterlab, notebook, jupyter server
jupyterlab-gitMixed
AI / ML / notebook-mlops
jupyterlab
oss-projectaka jupyter lab
jupyterlab-gitOn-prem
DevTools & CI / ide-editor

Exploitability

Official Patch Available
Workaround Available
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques
Execution
Initial Access
View detailed technique mapping

References

https://github.com/jupyterlab/jupyterlab-git/commit/c6d37b88f36aa59aee317930b95e427fb9d6b09b
github.com
https://github.com/jupyterlab/jupyterlab-git/releases/tag/v0.54.0
github.com
https://github.com/jupyterlab/jupyterlab-git/security/advisories/GHSA-f962-v9hr-pfg5
github.com

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