{"id":"CVE-2026-40910","summary":"frp: Authentication bypass in frp HTTP vhost routing when routeByHTTPUser is used for access control","details":"frp is a fast reverse proxy. From 0.43.0 to 0.68.0, frp contains an authentication bypass in the HTTP vhost routing path when routeByHTTPUser is used as part of access control. In proxy-style requests, the routing logic uses the username from Proxy-Authorization to select the routeByHTTPUser backend, while the access control check uses credentials from the regular Authorization header. As a result, an attacker who can reach the HTTP vhost entrypoint and knows or can guess the protected routeByHTTPUser value may access a backend protected by httpUser / httpPassword even with an incorrect Proxy-Authorization password. This issue affects deployments that explicitly use routeByHTTPUser. It does not affect ordinary HTTP proxies that do not use this feature. This vulnerability is fixed in 0.68.1.","aliases":["GHSA-pq96-pwvg-vrr9","GO-2026-5549"],"modified":"2026-07-08T08:02:56.175455888Z","published":"2026-04-21T20:09:00.893Z","database_specific":{"cwe_ids":["CWE-287"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40910.json","cna_assigner":"GitHub_M"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40910.json"},{"type":"ADVISORY","url":"https://github.com/fatedier/frp/security/advisories/GHSA-pq96-pwvg-vrr9"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-40910"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/fatedier/frp","events":[{"introduced":"fe5fb0326b2aa7741d5b5d8f8c4c3ca12bb4ed91"},{"fixed":"4ec8de973f52a1cabde54ad3499216cf1bc3dbaf"}],"database_specific":{"cpe":"cpe:2.3:a:fatedier:frp:*:*:*:*:*:*:*:*","source":["AFFECTED_FIELD","CPE_RANGE"],"extracted_events":[{"introduced":"0"},{"fixed":"0.68.1"},{"introduced":"0.43.0"}]}}],"versions":["v0.68.0","v0.67.0","v0.66.0","v0.65.0","v0.64.0","v0.63.0","v0.62.1","v0.62.0","v0.61.2","v0.61.1","v0.61.0","v0.60.0","v0.59.0","v0.58.1","v0.58.0","v0.57.0","v0.56.0","v0.55.1","v0.55.0","v0.54.0","v0.53.2","v0.53.1","v0.53.0","v0.52.3","v0.52.2","v0.52.1","v0.52.0","v0.51.3","v0.51.2","v0.51.1","v0.51.0","v0.50.0","v0.49.0","v0.48.0","v0.47.0","v0.46.1","v0.46.0","v0.45.0","v0.44.0","v0.43.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-40910.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N"}]}