---
cve: "CVE-2026-54527"
severity: "CRITICAL"
cvss: 9.3
epss: "36%"
vendor: "jupyterlab"
kev: false
exploited: false
published: "2026-07-08 21:16:49"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-17T05:47:14+02:00"
---

# CVE-2026-54527

> 9.3 CRITICAL · 🧪 PoC

## Beschreibung

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.

## CVSS-Vektor

```
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
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Gering | warn |

## Patch verfügbar (OSV)

- ccbf077d2149c6b2ed35eae8a7123ae129c022aa (Commit)
- c6d37b88f36aa59aee317930b95e427fb9d6b09b (Commit)

## Referenzen

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

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-54527) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_