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© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2026-54527

40
FAUCET Score

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.

First published: Jul 8, 2026Last modified: Jul 8, 2026

Impacted Technologies

VendorProductVersion(s)CPE
>= 0.30.1, < 0.54.0CPE matchmatch criteria
cpe:2.3:a:jupyter:jupyterlab-git:*:*:*:*:*:*:*:*
0.30.0CPE matchmatch criteria
cpe:2.3:a:jupyter:jupyterlab-git:0.30.0:-:*:*:*:*:*:*
0.30.0CPE matchmatch criteria
cpe:2.3:a:jupyter:jupyterlab-git:0.30.0:beta3:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 4.0

9.3CRITICAL

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:X/V:X/RE:X/U:X

Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
ACTIVE
VS Confidentiality
HIGH
VS Integrity
HIGH
VS Availability
HIGH
SS Confidentiality
HIGH
SS Integrity
HIGH
SS Availability
HIGH
Exploit Maturity
NOT_DEFINED
CvssVersion
4.0

Exploit Intelligence

EPSS Score
0.36%
Probability of exploitation in next 30 days
EPSS Percentile
28.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0036 is in the 26th percentile among its peer group of 265 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.6 Bluesky, 0.3 Mastodon, and 1.6 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

npmpatch availablevia ghsa
Product: @jupyterlab/gitFixed in: 0.54.0
pippatch availablevia ghsa
Product: jupyterlab-gitFixed in: 0.54.0
pippatch availablevia ghsa
Product: jupyterlab-git-coreFixed in: 0.54.0

Vendor Advisories (1)

pipGHSA-f962-v9hr-pfg5high

jupyterlab-git extension: Stored XSS leading to RCE

Jun 19, 2026

References

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