{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "python-tuf",
          "vendor": "theupdateframework",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 7.0.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "python-tuf is a Python reference implementation of The Update Framework (TUF). Prior to 7.0.0, DelegatedRole._is_target_in_pathpattern in tuf/api/_payload.py uses fnmatch.fnmatch, which applies os.path.normcase before matching and makes delegation path authorization case-insensitive on Windows. When a TUF repository has path-based delegations that differ only by case and an attacker-controlled role is visited before the legitimate role, ngclient can accept an attacker-provided target from the wrong delegation for a requested path. Linux and macOS clients are not affected because their path normalization does not change case. This issue is fixed in 7.0.0."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "NONE",
            "baseScore": 4,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-178",
              "description": "CWE-178: Improper Handling of Case Sensitivity",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-11-09T20:18:45.481Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/theupdateframework/python-tuf/security/advisories/GHSA-qp9x-wp8f-qgjj",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/theupdateframework/python-tuf/security/advisories/GHSA-qp9x-wp8f-qgjj"
        },
        {
          "name": "https://github.com/theupdateframework/python-tuf/commit/8ed4414946041030b264871ac41b929cf15774a5",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/theupdateframework/python-tuf/commit/8ed4414946041030b264871ac41b929cf15774a5"
        },
        {
          "name": "https://github.com/theupdateframework/python-tuf/releases/tag/v7.0.0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/theupdateframework/python-tuf/releases/tag/v7.0.0"
        }
      ],
      "source": {
        "advisory": "GHSA-qp9x-wp8f-qgjj",
        "discovery": "UNKNOWN"
      },
      "title": "python-tuf: Platform-dependent delegation path matching"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-123806",
    "datePublished": "2026-11-09T20:18:45.481Z",
    "dateReserved": "2026-11-06T15:27:56.226Z",
    "dateUpdated": "2026-11-09T20:18:45.481Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}