Squirrelly is a template engine implemented in JavaScript that works out of the box with ExpressJS. Squirrelly mixes pure template data with engine configuration options through the Express render API. By overwriting internal configuration options remote code execution may be triggered in downstream applications. Version 9.0.0 has a fix for this issue. For complete details refer to the referenced [GHSL-2021-023](https://securitylab.github.com/advisories/GHSL-2021-023-squirrelly/).

Affected Packages

npm squirrelly

Affected versions: 0 (fixed in 9.0.0)

Related CVEs

CVE-2021-32819

Key Information

GHSA ID

GHSA-q8j6-pwqx-pm96

Published

May 17, 2021 8:58 PM

Last Modified

September 11, 2023 4:25 PM

CVSS Score

7.5 /10

Primary Ecosystem

npm

Primary Package

squirrelly

GitHub Reviewed

✓ Yes

Dataset

Last updated: July 28, 2025 6:37 AM

Data from GitHub Advisory Database. This information is provided for research and educational purposes.