AUGUST 24, 2026
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Case File

CVE-2026-54527

CRITICAL · CVSS 9 EPSS 0.36% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-07-08 · Last synced 2026-08-07

CyberRota Analysis

AI-Generated

JupyterLab Git versions from 0.30.0b3 to 0.54.0 are vulnerable due to improper handling of Git filenames in the PlainTextDiff.ts createHeader() method, which can lead to cross-site scripting (XSS) attacks when users view renamed files in the commit history. This critical vulnerability allows an attacker to execute arbitrary JavaScript in the context of the victim's browser, potentially compromising sensitive data or user sessions. Organizations using affected versions should prioritize updating to version 0.54.0 or later to mitigate this risk.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

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CVE
CVE-2026-54527
Severity
CRITICAL
CVSS
9
EPSS
0.36%
Java

Original NVD 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.

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