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FKIE_CVE-2026-75602

Vulnerability from fkie_nvd - Published: 2026-09-03 17:17 - Updated: 2026-09-03 17:17
Severity
6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H
Summary
OpenList a file list program that supports multiple storage. Prior to 4.2.3, OpenList's offline-download feature at POST /api/fs/add_offline_download with tool: "SimpleHttp" accepts an attacker-supplied URL and saves its bytes under a per-task temporary directory before transferring them to the user's destination storage. The temporary filename comes from the attacker-controlled Content-Disposition header, is passed from parseFilenameFromContentDisposition in internal/offline_download/http/util.go to filepath.Join(task.TempDir, filename) in SimpleHttp.Run in internal/offline_download/http/client.go, and is opened with os.Create without a containment check. Because filepath.Join cleans .. segments, a non-admin user with PermAddOfflineDownload on any path can traverse out of task.TempDir and create, truncate, or overwrite any file writable by the OpenList process whose parent directory already exists. The server/handles/offline_download.go AddOfflineDownload route uses normal user authentication rather than AuthAdmin, and local-storage destinations fall through tryPutUrl in internal/offline_download/tool/add.go to the vulnerable SimpleHttp.Run path. This issue is fixed in version 4.2.3.
References
security-advisories@github.comhttps://github.com/OpenListTeam/OpenList/commit/9cc5dd969b9833c8cb4e14c338c3571dfdbe2108
security-advisories@github.comhttps://github.com/OpenListTeam/OpenList/releases/tag/v4.2.3
security-advisories@github.comhttps://github.com/OpenListTeam/OpenList/security/advisories/GHSA-h6cj-26g5-67fv
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "OpenList",
          "vendor": "OpenListTeam",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 4.2.3"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "OpenList a file list program that supports multiple storage. Prior to 4.2.3, OpenList\u0027s offline-download feature at POST /api/fs/add_offline_download with tool: \"SimpleHttp\" accepts an attacker-supplied URL and saves its bytes under a per-task temporary directory before transferring them to the user\u0027s destination storage. The temporary filename comes from the attacker-controlled Content-Disposition header, is passed from parseFilenameFromContentDisposition in internal/offline_download/http/util.go to filepath.Join(task.TempDir, filename) in SimpleHttp.Run in internal/offline_download/http/client.go, and is opened with os.Create without a containment check. Because filepath.Join cleans .. segments, a non-admin user with PermAddOfflineDownload on any path can traverse out of task.TempDir and create, truncate, or overwrite any file writable by the OpenList process whose parent directory already exists. The server/handles/offline_download.go AddOfflineDownload route uses normal user authentication rather than AuthAdmin, and local-storage destinations fall through tryPutUrl in internal/offline_download/tool/add.go to the vulnerable SimpleHttp.Run path. This issue is fixed in version 4.2.3."
    }
  ],
  "id": "CVE-2026-75602",
  "lastModified": "2026-09-03T17:17:23.757",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 6.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "privilegesRequired": "HIGH",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.2,
        "impactScore": 5.2,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-09-03T17:17:23.757",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/OpenListTeam/OpenList/commit/9cc5dd969b9833c8cb4e14c338c3571dfdbe2108"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/OpenListTeam/OpenList/releases/tag/v4.2.3"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/OpenListTeam/OpenList/security/advisories/GHSA-h6cj-26g5-67fv"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-22"
        },
        {
          "lang": "en",
          "value": "CWE-73"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Primary"
    }
  ]
}



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