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Vulnerability record · CVE-2021-32822 · published 16 August 2021

CVE-2021-32822: Hbs project hbs code injection vulnerability

Hbs Project · Hbs

The npm hbs package is an Express view engine wrapper for Handlebars. Depending on usage, users of hbs may be vulnerable to a file disclosure vulnerability. There is currently no patch for this vulnerability. hbs mixes pure template data with engine configuration options through the Express render API. By overwriting internal configuration options a file disclosure vulnerability may be triggered in downstream applications. For an example PoC see the referenced GHSL-2021-020.

5.3 CVSS 3.1 Medium EPSS 1.2% · top 33.6% CWE-538 · CWE-538CWE-94 · Code injection
5.3CVSS 3.1 base score, v2 5.0
1.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

The npm hbs package is an Express view engine wrapper for Handlebars. Depending on usage, users of hbs may be vulnerable to a file disclosure vulnerability. There is currently no patch for this vulnerability. hbs mixes pure template data with engine configuration options through the Express render API. By overwriting internal configuration options a file disclosure vulnerability may be triggered in downstream applications. For an example PoC see the referenced GHSL-2021-020.

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

Affected products

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

References

LinkTags
https://securitylab.github.com/advisories/GHSL-2021-020-pillarjs-hbs/ ExploitThird Party Advisory
https://securitylab.github.com/advisories/GHSL-2021-020-pillarjs-hbs/ ExploitThird Party Advisory

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Related vulnerabilities

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

8.1CVE-2026-16231Hbs project hbs cross-site scripting vulnerabilityhbs is an Express view engine that wraps Handlebars. Its registerAsyncHelper API bypasses Handlebars' automatic HTML escaping: an async helper return…EPSS 0.23%

Source: NIST National Vulnerability Database (record CVE-2021-32822), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.