{"action":"Upgrade handlebars to 4.7.9 or later.","affected":[{"fixed":"4.7.9","introduced":"4.0.0"}],"component":"handlebars","cve_ids":["CVE-2026-33916"],"ecosystem":"npm","epss":0.0028,"exploited":false,"fixed_versions":["4.7.9"],"ghsa_id":"GHSA-2qvq-rjwj-gvw9","id":"tcs_01M5KETXKHDBV57DXJPJRPH25Y","modified_at":"2026-09-10T03:50:36.381674695Z","published_at":"2026-03-26T22:20:51Z","references":["https://osv.dev/vulnerability/GHSA-2qvq-rjwj-gvw9","https://github.com/handlebars-lang/handlebars.js/security/advisories/GHSA-2qvq-rjwj-gvw9","https://nvd.nist.gov/vuln/detail/CVE-2021-23369","https://nvd.nist.gov/vuln/detail/CVE-2021-23383","https://nvd.nist.gov/vuln/detail/CVE-2026-33916","https://github.com/handlebars-lang/handlebars.js/commit/68d8df5a88e0a26fe9e6084c5c6aaebe67b07da2","https://github.com/handlebars-lang/handlebars.js","https://github.com/handlebars-lang/handlebars.js/releases/tag/v4.7.9"],"severity":{"label":"medium","score":4.7},"sources":[{"source":"osv","source_id":"GHSA-2qvq-rjwj-gvw9","url":"https://osv.dev/vulnerability/GHSA-2qvq-rjwj-gvw9"}],"summary":"Handlebars.js has Prototype Pollution Leading to XSS through Partial Template Injection"}