{"id":"GHSA-g9r4-xpmj-mj65","summary":"Prototype Pollution in handlebars","details":"Versions of `handlebars` prior to 3.0.8 or 4.5.3 are vulnerable to prototype pollution. It is possible to add or modify properties to the Object prototype through a malicious template. This may allow attackers to crash the application or execute Arbitrary Code in specific conditions.\n\n\n## Recommendation\n\nUpgrade to version 3.0.8, 4.5.3 or later.","modified":"2026-07-17T21:10:55.881733849Z","published":"2020-09-04T15:06:32Z","database_specific":{"github_reviewed_at":"2020-08-31T18:55:14Z","nvd_published_at":null,"cwe_ids":["CWE-1321"],"severity":"HIGH","github_reviewed":true},"references":[{"type":"WEB","url":"https://www.npmjs.com/advisories/1325"}],"affected":[{"package":{"name":"handlebars","ecosystem":"npm","purl":"pkg:npm/handlebars"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"3.0.8"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2020/09/GHSA-g9r4-xpmj-mj65/GHSA-g9r4-xpmj-mj65.json"}},{"package":{"name":"handlebars","ecosystem":"npm","purl":"pkg:npm/handlebars"},"ranges":[{"type":"SEMVER","events":[{"introduced":"4.0.0"},{"fixed":"4.5.3"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2020/09/GHSA-g9r4-xpmj-mj65/GHSA-g9r4-xpmj-mj65.json"}}],"schema_version":"1.9.0"}