{"cve":"CVE-2026-40910","nvd":{"published":"2026-04-21T21:16:45.157","modified":"2026-10-26T21:10:00.170","status":"Analyzed","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","score":9.1},"cwes":["CWE-287"],"references":["https://github.com/fatedier/frp/security/advisories/GHSA-pq96-pwvg-vrr9","https://github.com/fatedier/frp/security/advisories/GHSA-pq96-pwvg-vrr9"],"products":["fatedier:frp"],"source":"nvd","synced_at":"2026-10-26T21:38:48.864438205+00:00"},"epss":{"cve":"CVE-2026-40910","score":0.00269,"percentile":0.18884,"date":"2026-10-26"},"kev":null,"osv":[{"id":"GHSA-pq96-pwvg-vrr9","url":"https://osv.dev/vulnerability/GHSA-pq96-pwvg-vrr9","summary":"frp has an authentication bypass in HTTP vhost routing when routeByHTTPUser is used for access control","modified":"2026-06-25T23:11:19.077313887Z","packages":[{"ecosystem":"Go","name":"github.com/fatedier/frp","purl":"pkg:golang/github.com/fatedier/frp","ranges":[">=0.43.0 <0.68.1"],"fixed":["0.68.1"]}]},{"id":"GO-2026-5549","url":"https://osv.dev/vulnerability/GO-2026-5549","summary":"frp has an authentication bypass in HTTP vhost routing when routeByHTTPUser is used for access control in github.com/fatedier/frp","modified":"2026-06-25T23:01:21.716845642Z","packages":[{"ecosystem":"Go","name":"github.com/fatedier/frp","purl":"pkg:golang/github.com/fatedier/frp","ranges":[">=0.43.0 <0.68.1"],"fixed":["0.68.1"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}