{"id":"CVE-2026-40302","summary":"zrok has reflected XSS in GitHub OAuth callback via unsanitized refreshInterval error rendering","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.","aliases":["GHSA-4fxq-2x3x-6xqx","GO-2026-5118"],"modified":"2026-07-15T01:49:21.704408251Z","published":"2026-04-17T20:56:08.368Z","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"},"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"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/openziti/zrok","events":[{"introduced":"0"},{"fixed":"69b9b8dd6d96be15639338414574aa5003f5f8f2"}],"database_specific":{"cpe":"cpe:2.3:a:netfoundry:zrok:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"fixed":"2.0.1"}],"source":["AFFECTED_FIELD","CPE_RANGE","REFERENCES"]}}],"versions":["v2.0.0","v2.0.0-rc9","v2.0.0-rc8","v2.0.0-rc7","v2.0.0-rc6","v2.0.0-rc5","v1.1.11","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","v0.4.22","v0.4.21","v0.4.20","v0.4.19","v0.4.18","v0.4.17","v0.4.16","v0.4.15","v0.4.14","v0.4.13","v0.4.12","v0.4.11","v0.4.10","v0.4.9","v0.4.8","v0.4.7","v0.4.6","v0.4.5","v0.4.4","v0.4.3","v0.4.2","v0.4.0","v0.3.6","v0.3.5","v0.3.5-rc1","v0.3.4","v0.3.2","v0.3.1","v0.3.0","v0.3.0-rc6","v0.3.0-rc5","v0.3.0-rc4","v0.3.0-rc3","v0.3.0-rc2","v0.3.0-rc1","v0.2.18","v0.2.17","v0.2.16","v0.2.15","v0.2.14","v0.2.13","v0.2.12","v0.2.11","v0.2.10","v0.2.9","v0.2.8","v0.2.7","v0.2.6","v0.2.5","v0.2.4","v0.2.3","v0.2.2","v0.2.1","v0.2.0.4","v0.2.0.3","v0.2.0.2","v0.2.0.1","v0.2.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-40302.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"}]}