Underscorejs maintains a JavaScript utility library with a narrow but widely embedded footprint across web applications, where its durable vulnerability signal centers on resource-handling and code-generation issues such as unthrottled allocation and code-injection weaknesses. Live severity, exploitation, and exposure counts are shown alongside this summary.
The number and severity of CVEs published that impact products developed by Underscorejs over time
Signals from CVEs in this vendor scope (2 CVEs).
2 CVEs · Highest risk first
| CVE | Published | CVSS | Risk | KEV | Exploit |
|---|---|---|---|---|---|
CVE-2021-23358HIGH The package underscore from 1.13.0-0 and before 1.13.0-2, from 1.3.2 and before 1.12.1 are vulnerable to Arbitrary Code Injection via the template function, particularly when a var | Mar 29, 2021 | 7.2 | 26 | NO | NO |
CVE-2026-27601MEDIUM Underscore.js is a utility-belt library for JavaScript. Prior to 1.13.8, the _.flatten and _.isEqual functions use recursion without a depth limit. Under very specific conditions, | Mar 3, 2026 | 5.9 | 21 | NO | NO |
Signals from CVEs in this vendor scope (2 CVEs).
An overview of all social media posts that mention a CVE ID that affects a product developed by Underscorejs.
Media articles that mention a CVE ID that affects a product developed by Underscorejs — matched by CVE ID, not by vendor name.