{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "4.5.3"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "61f43423a337b87db5fec1fe59f0725aaaa38df5"
            },
            {
              "fixed": "a733ae1e2b3b24d3857bd4cfff080130d777bdc7"
            }
          ],
          "repo": "https://github.com/jknack/handlebars.java",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-g29j-rwfv-h99w"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-22",
      "CWE-23",
      "CWE-552"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63490.json"
  },
  "details": "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.",
  "id": "CVE-2026-63490",
  "modified": "2026-08-22T03:30:52.017412954Z",
  "published": "2026-08-20T14:45:35.727Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/jknack/handlebars.java/releases/tag/v4.5.3"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63490.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/jknack/handlebars.java/security/advisories/GHSA-g29j-rwfv-h99w"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63490"
    },
    {
      "type": "FIX",
      "url": "https://github.com/jknack/handlebars.java/commit/61f43423a337b87db5fec1fe59f0725aaaa38df5"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Handlebars.java: Arbitrary file read in `SpringTemplateLoader` via URL-fragment suffix bypass"
}