ChainerRL Visualizer 0.1.1 vulnerable to Path Traversal via unsafe use of send_file function

{
  "id": "409deb349c1209e0d087c4bdab86f86e560c952fa955ca7f2e94c04399524b1e",
  "url": "https://osv.dev/vulnerability/GHSA-687h-86vc-5x59",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "ChainerRL Visualizer 0.1.1 vulnerable to Path Traversal via unsafe use of send_file function",
    "summary": "The chainer/chainerrl-visualizer repository through 0.1.1 on GitHub allows absolute path traversal because the Flask send_file function is used unsafely.",
    "evidence": "osv:GHSA-687h-86vc-5x59",
    "products": [
      {
        "name": {
          "value": "chainerrl-visualizer",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "0.1.0",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "0.1.1",
            "evidence": "/affected/0/versions"
          }
        ]
      }
    ],
    "severity": "critical",
    "structured": {
      "id": "GHSA-687h-86vc-5x59",
      "aliases": [
        "CVE-2022-31573",
        "GHSA-687h-86vc-5x59",
        "PYSEC-2026-309"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:L"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "0.1.1"
                }
              ]
            }
          ],
          "package": {
            "name": "chainerrl-visualizer",
            "purl": "pkg:pypi/chainerrl-visualizer",
            "ecosystem": "PyPI"
          },
          "versions": [
            "0.1.0",
            "0.1.1"
          ],
          "database_specific": {
            "source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2022/07/GHSA-687h-86vc-5x59/GHSA-687h-86vc-5x59.json"
          }
        }
      ],
      "modified": "2026-10-27T16:30:06.473986397Z",
      "provider": "osv",
      "references": [
        "https://nvd.nist.gov/vuln/detail/CVE-2022-31573",
        "https://github.com/github/securitylab/issues/669#issuecomment-1117265726",
        "https://github.com/chainer/chainerrl-visualizer",
        "https://github.com/pypa/advisory-database/tree/main/vulns/chainerrl-visualizer/PYSEC-2026-309.yaml",
        "https://pypi.org/project/chainerrl-visualizer"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-22"
        ],
        "severity": "CRITICAL",
        "github_reviewed": true,
        "nvd_published_at": "2022-07-11T01:15:00Z",
        "github_reviewed_at": "2022-07-21T20:45:59Z"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2022-31573",
        "evidence": "/aliases"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/database_specific/severity"
  },
  "source_id": "core-osv",
  "document_id": 462870,
  "published_at": "2022-07-12T00:00:58+00:00"
}