HighGHSA-62gr-4qp9-h98fCVE-2019-20922SNYK-JS-HANDLEBARS-480388

Regular Expression Denial of Service in Handlebars

Published 10 Feb 2022 · Updated 8 Jul 2026

Affected package

handlebarsnpm
Affected
>=4.0.0 <4.4.5
Fixed in
4.4.5
Update to the fixed version for your release line, for example:npm install handlebars@4.4.5

Details

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.

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References

Advisory data from OSV.dev (opens OSV.dev in a new tab), refreshed daily.