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Vulnerabilities / CVE-2021-23383

critical

CVE-2021-23383

nodejs-handlebars: Remote code execution when compiling untrusted compile templates with compat:true option

Published Modified CWE 1321
In the Trivy database since at least 24 Oct 2026, 07:11 UTCWhen it arrived before that build is not recorded.

Severity by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
GHSA9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Red Hat9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Trivy's own label is CRITICAL. Rated critical by NVD, GHSA, Ruby Advisory DB. Rated lower by Red Hat (medium).

Description

The package handlebars before 4.7.7 are vulnerable to Prototype Pollution when selecting certain compiling options to compile templates coming from an untrusted source.

Affected packages and fixed versions

SourcePackageFixed in
npm::GitHub Security Advisory npmhandlebars4.7.7
rubygems::Ruby Advisory Databasehandlebars-source>= 4.7.7
chainguardcode-server, commercial-gitlab-rails-ee-19.2, commercial-gitlab-rails-ee-19.3 and 35 more0 and 1 more
debian 10node-handlebarsno fix listed
debian 11node-handlebars3:4.7.6+~4.1.0-2
debian 12node-handlebars3:4.7.6+~4.1.0-2
debian 13node-handlebars3:4.7.6+~4.1.0-2
debian 14node-handlebars3:4.7.6+~4.1.0-2
debian 9libjs-handlebarsno fix listed
echonode-handlebars3:4.7.6+~4.1.0-2
Red Hatkibana, pcs, pcs-snmp and 4 moreno fix listed
seal npm::Seal Security Database@seal-security/handlebars, handlebars4.1.2-sp999
Show all 57 entries from 13 sources
SourcePackageFixed in
npm::GitHub Security Advisory npmhandlebars4.7.7
rubygems::Ruby Advisory Databasehandlebars-source>= 4.7.7
chainguardcode-server0
chainguardcommercial-gitlab-rails-ee-19.20
chainguardcommercial-gitlab-rails-ee-19.30
chainguardcommercial-gitlab-rails-ee-19.40
chainguardcommercial-gitlab-rails-ee-fips-19.20
chainguardcommercial-gitlab-rails-ee-fips-19.30
chainguardcommercial-gitlab-rails-ee-fips-19.40
chainguardgitlab-rails-ce-18.10
chainguardgitlab-rails-ce-18.110
chainguardgitlab-rails-ce-18.20
chainguardgitlab-rails-ce-18.30
chainguardgitlab-rails-ce-18.40
chainguardgitlab-rails-ce-18.50
chainguardgitlab-rails-ce-18.60
chainguardgitlab-rails-ce-18.70
chainguardgitlab-rails-ce-18.80
chainguardgitlab-rails-ce-18.90
chainguardgitlab-rails-ce-19.00
chainguardgitlab-rails-ce-19.10
chainguardgitlab-rails-ce-19.20
chainguardgitlab-rails-ce-19.30
chainguardgitlab-rails-ce-19.40
chainguardgitlab-rails-ce-19.50
chainguardgitlab-rails-ce-fips-18.10
chainguardgitlab-rails-ce-fips-18.110
chainguardgitlab-rails-ce-fips-18.20
chainguardgitlab-rails-ce-fips-18.30
chainguardgitlab-rails-ce-fips-18.40
chainguardgitlab-rails-ce-fips-18.50
chainguardgitlab-rails-ce-fips-18.60
chainguardgitlab-rails-ce-fips-18.70
chainguardgitlab-rails-ce-fips-18.80
chainguardgitlab-rails-ce-fips-18.90
chainguardgitlab-rails-ce-fips-19.00
chainguardgitlab-rails-ce-fips-19.10
chainguardgitlab-rails-ce-fips-19.20
chainguardgitlab-rails-ce-fips-19.30
chainguardgitlab-rails-ce-fips-19.419.4.0-r1
debian 10node-handlebarsno fix listed
debian 11node-handlebars3:4.7.6+~4.1.0-2
debian 12node-handlebars3:4.7.6+~4.1.0-2
debian 13node-handlebars3:4.7.6+~4.1.0-2
debian 14node-handlebars3:4.7.6+~4.1.0-2
debian 9libjs-handlebarsno fix listed
echonode-handlebars3:4.7.6+~4.1.0-2
Red Hatkibanano fix listed
Red Hatpcsno fix listed
Red Hatpcs-snmpno fix listed
Red Hatpython-clufterno fix listed
Red Hatservicemesh-grafanano fix listed
Red Hatservicemesh-grafana-prometheusno fix listed
Red Hatservicemesh-prometheusno fix listed
seal npm::Seal Security Database@seal-security/handlebars4.1.2-sp999
seal npm::Seal Security Databasehandlebars4.1.2-sp999
wolficode-server0

References

All 14 references

Vulnerability data compiled from the Trivy vulnerability database (trivy-db, Aqua Security, Apache License 2.0), which aggregates third-party advisories. CVE records are published by The MITRE Corporation under the CVE Terms of Use; CVE is a trademark of MITRE. This product uses data from the NVD API but is not endorsed or certified by the NVD. Severity, titles and advisory data from the GitHub Advisory Database (CC BY 4.0), Red Hat security data (CC BY 4.0) and the other sources linked on each entry. Entries may be summarised or re-formatted; the linked original is the authoritative record.