go-tuf Path Traversal in TAP 4 Multirepo Client Allows Arbitrary File Write via Malicious Repository Names

{
  "id": "f96a4cb800d6e9de521d03c77c2d9fe8d6929b04b66e22199235efbac8d0eb46",
  "url": "https://osv.dev/vulnerability/CVE-2026-24686",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "go-tuf Path Traversal in TAP 4 Multirepo Client Allows Arbitrary File Write via Malicious Repository Names",
    "summary": "go-tuf is a Go implementation of The Update Framework (TUF). go-tuf's TAP 4 Multirepo Client uses the map file repository name string (`repoName`) as a filesystem path component when selecting the local metadata cache directory. Starting in version 2.0.0 and prior to version 2.4.1, if an application accepts a map file from an untrusted source, an attacker can supply a `repoName` containing traversal (e.g., `../escaped-repo`) and cause go-tuf to create directories and write the root metadata file outside the intended `LocalMetadataDir` cache base, within the running process's filesystem permissions. Version 2.4.1 contains a patch.",
    "evidence": "osv:CVE-2026-24686",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-24686",
      "aliases": [
        "CVE-2026-24686",
        "GHSA-jqc5-w2xx-5vq4",
        "GO-2026-4377"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/theupdateframework/go-tuf",
              "type": "GIT",
              "events": [
                {
                  "introduced": "ecec5d3a09cfa74482f0797fa38b65a2942a655c"
                },
                {
                  "fixed": "d361e2ea24e427581343dee5c7a32b485d79fcc0"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "2.0.0"
                      },
                      {
                        "fixed": "2.4.1"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "fixed": "d361e2ea24e427581343dee5c7a32b485d79fcc0"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "cpe": "cpe:2.3:a:theupdateframework:go-tuf:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "2.0.0"
                      },
                      {
                        "fixed": "2.4.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v2.4.0",
            "v2.3.1",
            "v2.3.0",
            "v2.2.0",
            "v2.1.1",
            "v2.1.0",
            "v2.0.2",
            "v2.0.1",
            "v2.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-24686.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:29.346384838Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/24xxx/CVE-2026-24686.json",
        "https://github.com/theupdateframework/go-tuf/security/advisories/GHSA-jqc5-w2xx-5vq4",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-24686",
        "https://github.com/theupdateframework/go-tuf/commit/d361e2ea24e427581343dee5c7a32b485d79fcc0"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-22"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/24xxx/CVE-2026-24686.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-24686",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 496210,
  "published_at": "2026-01-27T00:45:43.422+00:00"
}