Answer in brief
CVE-2026-54527 records a Critical severity (CVSS 9.3) vulnerability in JupyterLab Git: Stored XSS leading to RCE. The current sources do not mark it as known exploited. The current feed maps jupyterlab/jupyterlab-git (generic), @jupyterlab/git (npm), jupyterlab-git (pip), jupyterlab-git-core (pip). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 9.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps jupyterlab/jupyterlab-git (generic), @jupyterlab/git (npm), jupyterlab-git (pip), jupyterlab-git-core (pip). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| jupyterlab/jupyterlab-gitgeneric | >= 0.30.0b3, < 0.54.0 | Not reported |
| @jupyterlab/gitnpm | >=0.30.0b3,<0.54.0-a1 | 0.54.0 |
| jupyterlab-gitpip | >=0.30.0b3,<0.54.0a1 | 0.54.0 |
| jupyterlab-git-corepip | >=0.30.0b3,<0.54.0a1 | 0.54.0 |
Published upstream
Jul 8, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jul 10, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 19, 2026
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.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-54527 records a Critical severity (CVSS 9.3) vulnerability in JupyterLab Git: Stored XSS leading to RCE. The current sources do not mark it as known exploited. The current feed maps jupyterlab/jupyterlab-git (generic), @jupyterlab/git (npm), jupyterlab-git (pip), jupyterlab-git-core (pip). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 9.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps jupyterlab/jupyterlab-git (generic), @jupyterlab/git (npm), jupyterlab-git (pip), jupyterlab-git-core (pip). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| jupyterlab/jupyterlab-gitgeneric | >= 0.30.0b3, < 0.54.0 | Not reported |
| @jupyterlab/gitnpm | >=0.30.0b3,<0.54.0-a1 | 0.54.0 |
| jupyterlab-gitpip | >=0.30.0b3,<0.54.0a1 | 0.54.0 |
| jupyterlab-git-corepip | >=0.30.0b3,<0.54.0a1 | 0.54.0 |
Published upstream
Jul 8, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jul 10, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 19, 2026
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.
Quoted source text, attributed separately from HOL analysis.