{"id":"GHSA-r4gv-qr8j-p3pg","summary":"handlebars.java FileTemplateLoader Path Traversal","details":"### Impact\nAny application that passes user-controlled input to Handlebars.compile() using a FileTemplateLoader (or ClassPathTemplateLoader) is vulnerable to arbitrary file read. This is a realistic attack surface for web applications that use template names from URL path parameters, request parameters, or other user-controlled sources.\n\n### Patches\ncom.github.jknack:handlebars:4.5.2\n\n### Workarounds\n\nValidate template name is derived from user input. \n\n```java\nif (!file.getPath().startsWith(new File(prefix).getCanonicalPath())) {\n        throw new IOException(\"Path traversal attempt detected: \" + location);\n}\n```","aliases":["CVE-2026-55760"],"modified":"2026-06-17T19:11:27.636652Z","published":"2026-06-17T18:42:09Z","database_specific":{"github_reviewed":true,"github_reviewed_at":"2026-06-17T18:42:09Z","nvd_published_at":null,"cwe_ids":["CWE-22"],"severity":"HIGH"},"references":[{"type":"WEB","url":"https://github.com/jknack/handlebars.java/security/advisories/GHSA-r4gv-qr8j-p3pg"},{"type":"PACKAGE","url":"https://github.com/jknack/handlebars.java"}],"affected":[{"package":{"name":"com.github.jknack:handlebars","ecosystem":"Maven","purl":"pkg:maven/com.github.jknack/handlebars"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.5.2"}]}],"versions":["0.10.0","0.11.0","0.12.0","0.4.0","0.4.1","0.4.2","0.5.0","0.5.1","0.5.2","0.5.3","0.5.4","0.5.5","0.6.0","0.6.1","0.6.2","0.7.0","0.8.0","0.9.0","1.0.0","1.1.0","1.1.1","1.1.2","1.2.0","1.2.1","1.3.0","1.3.1","1.3.2","2.0.0","2.1.0","2.2.0","2.2.1","2.2.2","2.2.3","2.3.0","2.3.1","2.3.2","3.0.0","4.0.0","4.0.1","4.0.2","4.0.3","4.0.4","4.0.5","4.0.6","4.0.7","4.1.0","4.1.1","4.1.2","4.2.0","4.2.1","4.3.0","4.3.1","4.4.0","4.5.0","4.5.1"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-r4gv-qr8j-p3pg/GHSA-r4gv-qr8j-p3pg.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"}]}