High severity7.5NVD Advisory· Published Sep 30, 2020· Updated Jun 17, 2026

CVE-2019-20922

Description

Handlebars before 4.4.5 allows Regular Expression Denial of Service (ReDoS) because of eager matching. The parser may be forced into an endless loop while processing crafted templates. This may allow attackers to exhaust system resources.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected packages

Versions sourced from the GitHub Security Advisory.

Package	Affected versions	Patched versions
handlebarsnpm	>= 4.0.0, < 4.4.5	4.4.5

Affected products

Handlebarsjs/Handlebars
cpe:2.3:a:handlebarsjs:handlebars:*:*:*:*:*:node.js:*:*
Range: >=4.0.0,<4.4.5
Handlebars/Handlebarsdescription
ghsa-coords
pkg:npm/handlebars
Range: >= 4.0.0, < 4.4.5

Patches

Vulnerability mechanics

References

github.com/handlebars-lang/handlebars.js/commit/8d5530ee2c3ea9f0aee3fde310b9f36887d00b8bnvdPatchThird Party AdvisoryWEB
github.com/advisories/GHSA-62gr-4qp9-h98fghsaADVISORY
nvd.nist.gov/vuln/detail/CVE-2019-20922ghsaADVISORY
snyk.io/vuln/SNYK-JS-HANDLEBARS-480388nvdThird Party AdvisoryWEB
www.npmjs.com/advisories/1300nvdThird Party AdvisoryWEB
www.npmjs.com/package/handlebarsghsaWEB

News mentions

No linked articles in our index yet.

cvss	0.488
epss	0.003
exploit	0.000
kev	0.000
patch	-0.070
ransomware	0.000