YARD static cache reads raw traversal paths before router sanitization

{
  "id": "ab575819651e6ba2ea59be25d0ba0cbc683f6496cea0c09c161879abada7a6a3",
  "url": "https://osv.dev/vulnerability/CVE-2026-49342",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "YARD static cache reads raw traversal paths before router sanitization",
    "summary": "YARD is a documentation generation tool for the Ruby programming language. Prior to version 0.9.44, YARD's static cache lookup reads a request path before the router's path cleanup runs. When a server is configured with a document root, a traversal path such as `/../yard-cache-secret.html` is joined against that root and can return a readable sibling `.html` file outside the intended static tree. Version 0.9.44 patches the issue.",
    "evidence": "osv:CVE-2026-49342",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-49342",
      "aliases": [
        "CVE-2026-49342",
        "GHSA-pxcc-8665-phx8"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/lsegal/yard",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "6f678d088a8bdfe7b47072311f7927958c13eb4b"
                },
                {
                  "fixed": "f78c19f0dd33a407085b4ed181bb60c0aa0078b4"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "0.9.44"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "fixed": "f78c19f0dd33a407085b4ed181bb60c0aa0078b4"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v0.9.43",
            "v0.9.42",
            "v0.9.41",
            "v0.9.40",
            "v0.9.39",
            "v0.9.38",
            "v0.9.37",
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            "v0.9.33",
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            "v0.9.30",
            "v0.9.29",
            "v0.9.28",
            "v0.9.27",
            "v0.9.26",
            "v0.9.25",
            "v0.9.24",
            "v0.9.23",
            "v0.9.22",
            "v0.9.21",
            "v0.9.20",
            "v0.9.19",
            "v0.9.17",
            "v0.9.16",
            "v0.9.15",
            "v0.9.14",
            "v0.9.13",
            "v0.9.12",
            "v0.9.11",
            "v0.9.10",
            "v0.9.9",
            "v0.9.8",
            "v0.9.7",
            "v0.9.6",
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            "v0.8.7.1",
            "v0.8.7",
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            "v0.8.6.2",
            "v0.8.6",
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            "v0.8.5.1",
            "v0.8.5",
            "v0.8.4.1",
            "v0.8.4",
            "v0.8.3",
            "v0.8.2.1",
            "v0.8.2",
            "v0.8.1",
            "v0.8.0",
            "v0.7.4",
            "v0.7.3",
            "v0.7.2",
            "v0.7.1",
            "v0.7.0",
            "v0.6.8",
            "v0.6.7",
            "v0.6.6",
            "v0.6.5",
            "v0.6.4",
            "v0.6.3",
            "v0.6.2",
            "v0.6.1",
            "v0.6.0",
            "v0.5.8",
            "v0.5.7",
            "v0.5.6",
            "v0.5.5",
            "v0.5.4",
            "v0.5.3",
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            "v0.5.1",
            "v0.5.0",
            "v0.4.0",
            "v0.2.3.2",
            "v0.2.3.1",
            "v0.2.3",
            "v0.2.2"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-49342.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:20.598475494Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/49xxx/CVE-2026-49342.json",
        "https://github.com/lsegal/yard/security/advisories/GHSA-pxcc-8665-phx8",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-49342",
        "https://github.com/lsegal/yard/commit/f78c19f0dd33a407085b4ed181bb60c0aa0078b4"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-22"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/49xxx/CVE-2026-49342.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-49342",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 486942,
  "published_at": "2026-06-19T19:13:59.598+00:00"
}