{"cve":"CVE-2026-63490","nvd":{"published":"2026-08-20T15:18:04.577","modified":"2026-10-18T20:10:00.110","status":"Deferred","description":"Handlebars.java provides logic-less and semantic Mustache templates with Java. Prior to 4.5.3, com.github.jknack.handlebars.springmvc.SpringTemplateLoader resolves attacker-influenced Spring MVC view names through Spring ResourceLoader without the path-containment validation used by other URL-based loaders. In handlebars-springmvc/src/main/java/com/github/jknack/handlebars/springmvc/SpringTemplateLoader.java, a view name using a file: or classpath: URL and ending with the # fragment delimiter places the appended .hbs suffix in the fragment, which FileUrlResource.exists() and URL.openStream() discard. HandlebarsViewResolver in handlebars-springmvc/src/main/java/com/github/jknack/handlebars/springmvc/HandlebarsViewResolver.java then passes the attacker-controlled name to handlebars.compile(), allowing an unauthenticated remote attacker to read files accessible to the JVM when an application exposes a controller with a user-influenced view name. This issue is fixed in version 4.5.3.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","score":7.5},"cwes":["CWE-22","CWE-23","CWE-552"],"references":["https://github.com/jknack/handlebars.java/commit/61f43423a337b87db5fec1fe59f0725aaaa38df5","https://github.com/jknack/handlebars.java/releases/tag/v4.5.3","https://github.com/jknack/handlebars.java/security/advisories/GHSA-g29j-rwfv-h99w","https://github.com/jknack/handlebars.java/security/advisories/GHSA-g29j-rwfv-h99w"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:49:38.260478770+00:00"},"epss":{"cve":"CVE-2026-63490","score":0.00688,"percentile":0.52429,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-g29j-rwfv-h99w","url":"https://osv.dev/vulnerability/GHSA-g29j-rwfv-h99w","summary":"Handlebars.java: Arbitrary file read in `SpringTemplateLoader` via URL-fragment suffix bypass","modified":"2026-09-02T22:15:05.350759964Z","packages":[{"ecosystem":"Maven","name":"com.github.jknack:handlebars-springmvc","purl":"pkg:maven/com.github.jknack/handlebars-springmvc","ranges":["<4.5.3"],"fixed":["4.5.3"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}