Security advisory

{
  "id": "f5d3daf6104741c59049706d9fab167df1e4407be2533ffec2a6e53813588cac",
  "url": "https://osv.dev/vulnerability/CVE-2026-103088",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2026-103088",
    "summary": "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 and reads files outside the configured template base directory.",
    "evidence": "osv:CVE-2026-103088",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-103088",
      "aliases": [
        "CVE-2026-103088",
        "GHSA-pvrx-3g7m-fpgv"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/jknack/handlebars.java",
              "type": "GIT",
              "events": [
                {
                  "introduced": "a733ae1e2b3b24d3857bd4cfff080130d777bdc7"
                },
                {
                  "fixed": "f6ae3979917d05bef07f00befb4013ef00503660"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "4.5.3"
                      },
                      {
                        "fixed": "4.5.5"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "fixed": "f6ae3979917d05bef07f00befb4013ef00503660"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "f6ae3979917d05bef07f00befb4013ef00503660"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v4.5.5"
                  },
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "4.5.5"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v4.5.4",
            "v4.5.3"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-103088.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:34.007827219Z",
      "provider": "osv",
      "references": [
        "https://github.com/jknack/handlebars.java/releases/tag/v4.5.5",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/103xxx/CVE-2026-103088.json",
        "https://github.com/jknack/handlebars.java/security/advisories/GHSA-pvrx-3g7m-fpgv",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-103088",
        "https://github.com/jknack/handlebars.java/commit/f6ae3979917d05bef07f00befb4013ef00503660",
        "https://github.com/jknack/handlebars.java"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-24"
        ],
        "cna_assigner": "mitre",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/103xxx/CVE-2026-103088.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-103088",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 500937,
  "published_at": "2026-09-30T00:55:19.94+00:00"
}