zrok copy writes attacker-controlled WebDAV paths outside the destination root

{
  "id": "6f15001f00239475f7ff954fddb1872a4ef8b1242c9f3e751fc3fa4cec2a0d8f",
  "url": "https://osv.dev/vulnerability/CVE-2026-45576",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "zrok copy writes attacker-controlled WebDAV paths outside the destination root",
    "summary": "zrok is software for sharing web services, files, and network resources. From 0.4.23 until 2.0.3, `zrok2 copy` stores attacker-controlled WebDAV or zrok drive paths such as /../outside.txt in the source inventory and passes them to FilesystemTarget.WriteStream, allowing the sync pipeline to write files outside the selected local filesystem destination root. This issue is fixed in version 2.0.3.",
    "evidence": "osv:CVE-2026-45576",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-45576",
      "aliases": [
        "CVE-2026-45576",
        "GHSA-c656-jcx2-7pqj",
        "GO-2026-5315"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:H/SI:H/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/openziti/zrok",
              "type": "GIT",
              "events": [
                {
                  "introduced": "8d88e32d910986d49b576972d590398a6eb9a2cb"
                },
                {
                  "fixed": "01695e8ac32d5a3f35457a9f87ace076448e6917"
                },
                {
                  "fixed": "a5811e61589d2f804267c6de4a9056db1bdea457"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:netfoundry:zrok:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0.4.23"
                      },
                      {
                        "fixed": "2.0.3"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "a5811e61589d2f804267c6de4a9056db1bdea457"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "01695e8ac32d5a3f35457a9f87ace076448e6917"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v2.0.3"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.1.11",
            "v2.0.2",
            "v2.0.1",
            "v2.0.0",
            "v2.0.0-rc9",
            "v2.0.0-rc8",
            "v2.0.0-rc7",
            "v2.0.0-rc6",
            "v2.0.0-rc5",
            "v1.1.10",
            "v1.1.8",
            "v1.1.7",
            "v1.1.6",
            "v1.1.5",
            "v1.1.4",
            "v1.1.3",
            "v1.1.2",
            "v1.1.1",
            "v1.1.0",
            "v1.0.8",
            "v1.0.7",
            "v1.0.6",
            "v1.0.5",
            "v1.0.4",
            "v1.0.3",
            "v1.0.2",
            "v1.0.1",
            "v1.0.0",
            "v0.4.49",
            "v0.4.48",
            "v0.4.47",
            "v0.4.46",
            "v0.4.45",
            "v0.4.44",
            "v0.4.43",
            "v0.4.42",
            "v0.4.41",
            "v0.4.40",
            "v0.4.39",
            "v0.4.38",
            "v0.4.37",
            "v0.4.36",
            "v0.4.35",
            "v0.4.34",
            "v0.4.33",
            "v0.4.32",
            "v0.4.31",
            "v0.4.30",
            "v0.4.29",
            "v0.4.28",
            "v0.4.26",
            "v0.4.27",
            "v0.4.24",
            "v0.4.25",
            "v0.4.23"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-45576.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:26.087138156Z",
      "provider": "osv",
      "references": [
        "https://github.com/openziti/zrok/releases/tag/v2.0.3",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45576.json",
        "https://github.com/openziti/zrok/security/advisories/GHSA-c656-jcx2-7pqj",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-45576",
        "https://github.com/openziti/zrok/commit/a5811e61589d2f804267c6de4a9056db1bdea457"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-22"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45576.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-45576",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 492658,
  "published_at": "2026-07-16T16:45:52.766+00:00"
}