CVE-2026-55760
HighCVSS 7.5Exploitation Probability (EPSS)
Low risk45th percentile - higher than 45% of all known CVEs
Summary
A path traversal vulnerability in Handlebars.java allows arbitrary file read. Applications passing user-controlled input to Handlebars.compile() with FileTemplateLoader or ClassPathTemplateLoader are affected.
Risk Assessment
An attacker can read sensitive system or configuration files, leading to data leakage and potential compromise of the application.
Recommendation
Upgrade Handlebars.java to version 4.5.2 or later. Additionally, validate and sanitize user input used as template names.
Other vulnerabilities in Handlebars.java
See all- CVE-2026-103088High
Handlebars.java before 4.5.5 allows directory traversal. In handlebars-springmvc 4.5.3 and 4.5.4, the path-containment fix for CVE-2026-63490 validates template locations as raw percent-encoded strings, whereas the template file is opened through a URL handler that percent-decodes the path. In a Spring MVC application with a file: template prefix and a request-derived view name, a percent-encoded traversal such as %2e%2e/ bypasses both the view-resolver check and the loader-side containment, reading files outside the configured template base directory.
- CVE-2026-63490High
Handlebars.java before version 4.5.3 contains a file read vulnerability. SpringTemplateLoader does not properly validate view names, allowing a remote attacker to read files accessible to the JVM when an application exposes a controller with a user-influenced view name. Fixed in version 4.5.3.
Original NVD description (English source)
Handlebars.java provides logic-less and semantic Mustache templates with Java. Prior to 4.5.2, applications that pass user-controlled input to Handlebars.compile() using FileTemplateLoader or ClassPathTemplateLoader are vulnerable to path traversal, allowing arbitrary file read through template names derived from URL path parameters, request parameters, or other user-controlled sources. This issue is fixed in version 4.5.2.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS