CVE-2026-63490
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 3.1
- 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - EPSS
- 0.7% chance of exploitation in the next 30 days; higher than 52% of CVEs (scores of 2026-10-25)
- CWEs
- CWE-22, CWE-23, CWE-552
- Published
- Modified
- Record from
- the NVD, synced
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-g29j-rwfv-h99w | Maven | com.github.jknack:handlebars-springmvc | <4.5.3 | 4.5.3 |
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