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Vulnerability record · CVE-2021-23369 · published 12 April 2021

CVE-2021-23369: Handlebarsjs handlebars vulnerability

Handlebarsjs · Handlebars

The package handlebars before 4.7.7 are vulnerable to Remote Code Execution (RCE) when selecting certain compiling options to compile templates coming from an untrusted source.

9.8 CVSS 3.1 Critical EPSS 7.0% · top 6.0%
9.8CVSS 3.1 base score, v2 7.5
7.0%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
14References, 8 tagged exploit
17 Jun 2026Last modified by NVD

Description

The package handlebars before 4.7.7 are vulnerable to Remote Code Execution (RCE) when selecting certain compiling options to compile templates coming from an untrusted source.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/handlebars-lang/handlebars.js/commit/b6d3de7123eebba603e321f04afdbae608e8fea8 PatchThird Party Advisory
https://github.com/handlebars-lang/handlebars.js/commit/f0589701698268578199be25285b2ebea1c1e427 PatchThird Party Advisory
https://security.netapp.com/advisory/ntap-20210604-0008/ Third Party Advisory
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARS-1074950 ExploitThird Party Advisory
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWER-1074951 ExploitThird Party Advisory
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1074952 ExploitThird Party Advisory
https://snyk.io/vuln/SNYK-JS-HANDLEBARS-1056767 ExploitThird Party Advisory
https://github.com/handlebars-lang/handlebars.js/commit/b6d3de7123eebba603e321f04afdbae608e8fea8 PatchThird Party Advisory
https://github.com/handlebars-lang/handlebars.js/commit/f0589701698268578199be25285b2ebea1c1e427 PatchThird Party Advisory
https://security.netapp.com/advisory/ntap-20210604-0008/ Third Party Advisory
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARS-1074950 ExploitThird Party Advisory
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWER-1074951 ExploitThird Party Advisory
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1074952 ExploitThird Party Advisory
https://snyk.io/vuln/SNYK-JS-HANDLEBARS-1056767 ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2021-23369), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.