{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:netfoundry:zrok:*:*:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "2.0.1"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "CPE_RANGE",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "69b9b8dd6d96be15639338414574aa5003f5f8f2"
            }
          ],
          "repo": "https://github.com/openziti/zrok",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-4fxq-2x3x-6xqx"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-116",
      "CWE-79"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40302.json"
  },
  "details": "zrok is software for sharing web services, files, and network resources. Prior to version 2.0.1, the proxyUi template engine uses Go's text/template (which performs no HTML escaping) instead of html/template. The GitHub OAuth callback handlers in both publicProxy and dynamicProxy embed the attacker-controlled refreshInterval query parameter verbatim into an error message when time.ParseDuration fails, and render that error unescaped into HTML. An attacker can deliver a crafted login URL to a victim; after the victim completes the GitHub OAuth flow, the callback page executes arbitrary JavaScript in the OAuth server's origin. Version 2.0.1 patches the issue.",
  "id": "CVE-2026-40302",
  "modified": "2026-07-15T01:49:21.704408251Z",
  "published": "2026-04-17T20:56:08.368Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/openziti/zrok/releases/tag/v2.0.1"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40302.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/openziti/zrok/security/advisories/GHSA-4fxq-2x3x-6xqx"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-40302"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "zrok has reflected XSS in GitHub OAuth callback via unsanitized refreshInterval error rendering"
}