Is CVE-2021-32819 actively exploited?

Yes. CVE-2021-32819 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, which means exploitation in the wild has been confirmed.

Can CVE-2021-32819 be exploited remotely?

The attack vector of CVE-2021-32819 has not been classified yet.

What is the CVSS score of CVE-2021-32819?

CVE-2021-32819 has not received a CVSS score yet.

HOME VULNERABILITIESCVE-2021-32819

UNKNOWNCISA KEVIN THE WILD

CVE-2021-32819

Published: April 11, 2026

EPSS:89.82%probability of exploitation in 30 daysPercentile:99.6th

Official Description

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. This issue is fixed in version 9.0.0. For complete details refer to the referenced GHSL-2021-023.

NVD Source

Technical Analysis

CVE-2021-32819 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CISA has added CVE-2021-32819 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.