{"id":"CVE-2021-23383","aliases":["GHSA-765h-qjxv-5f44"],"url":"https://o3.security/vulnerability/CVE-2021-23383","summary":"Prototype Pollution in handlebars","details":"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.","published":"2021-05-04T09:15:07.753Z","modified":"2026-07-09T01:06:10.986802Z","cvss":{"score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":4,"affectedPackages":[{"ecosystem":"npm","name":"handlebars","fixedVersion":"4.7.7"}],"fix":{"url":"https://github.com/handlebars-lang/handlebars.js/commit/f0589701698268578199be25285b2ebea1c1e427","label":"handlebars-lang/handlebars.js@f058970"},"references":[{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20210618-0007/"},{"type":"FIX","url":"https://github.com/handlebars-lang/handlebars.js/commit/f0589701698268578199be25285b2ebea1c1e427"},{"type":"FIX","url":"https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARS-1279031"},{"type":"FIX","url":"https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWER-1279032"},{"type":"FIX","url":"https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1279030"},{"type":"FIX","url":"https://snyk.io/vuln/SNYK-JS-HANDLEBARS-1279029"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-09T01:06:10.986802Z"}}