{"uuid": "72d6e1e6-48b2-4376-a8f0-5063811a9792", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2026-63490", "type": "seen", "source": "https://gist.github.com/alon710/ac9a336078ecd53e84e4088322a7f9af", "content": "# CVE-2026-63490: CVE-2026-63490: Path Traversal and Arbitrary File Disclosure in Handlebars.java\n\n> **CVSS Score:** 7.5\n> **Published:** 2026-09-02\n> **Full Report:** https://cvereports.com/reports/CVE-2026-63490\n\n## Summary\nCVE-2026-63490 is a critical path traversal vulnerability in the Spring MVC integration of Handlebars.java. It allows unauthenticated remote attackers to bypass suffix validation and retrieve arbitrary system files via crafted dynamic view names.\n\n## TL;DR\nUnauthenticated path traversal in Handlebars.java allows arbitrary file retrieval by exploiting a parser discrepancy between Java's URL resolver and template suffix enforcement.\n\n## Exploit Status: POC\n\n## Technical Details\n\n- **CWE ID**: CWE-22, CWE-23, CWE-552\n- **Attack Vector**: Network\n- **CVSS v3.1 Score**: 7.5 (High)\n- **EPSS Score**: 0.0047\n- **Impact**: Arbitrary File Disclosure\n- **Exploit Status**: Proof of Concept\n- **KEV Status**: Not Listed\n\n## Affected Systems\n\n- Applications implementing handlebars-springmvc below version 4.5.3\n- **handlebars-springmvc**: < 4.5.3 (Fixed in: `4.5.3`)\n\n## Mitigation\n\n- Upgrade Handlebars.java dependency to version 4.5.3 or later\n- Refactor controller logic to avoid direct user influence on MVC view names\n- Implement strong input filtering for URL protocols and URL delimiters in controller paths\n\n**Remediation Steps:**\n1. Open the build configuration file (pom.xml or build.gradle).\n2. Locate the dependency for com.github.jknack:handlebars-springmvc.\n3. Update the version string to 4.5.3.\n4. Rebuild and deploy the application.\n5. Ensure view names returned by controllers are resolved against a static, validated list of templates.\n\n## References\n\n- [GitHub Security Advisory GHSA-g29j-rwfv-h99w](https://github.com/jknack/handlebars.java/security/advisories/GHSA-g29j-rwfv-h99w)\n- [CVE-2026-63490 Detail - NVD](https://nvd.nist.gov/vuln/detail/CVE-2026-63490)\n\n\n---\n*Generated by [CVEReports](https://cvereports.com/reports/CVE-2026-63490) - Automated Vulnerability Intelligence*", "creation_timestamp": "2026-09-03T11:31:46.882222Z"}