CVE-2026-40910

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 v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.2 / Impact : 4.2

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/fatedier/frp/security/advisories/GHSA-pq96-pwvg-vrr9	Exploit Vendor Advisory
https://github.com/fatedier/frp/security/advisories/GHSA-pq96-pwvg-vrr9	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:fatedier:frp:*:*:*:*:*:*:*:*

History

29 Apr 2026, 23:20

Type	Values Removed	Values Added
First Time		Fatedier Fatedier frp
CWE		NVD-CWE-noinfo
CPE		cpe:2.3:a:fatedier:frp::::::::
References	~~() https://github.com/fatedier/frp/security/advisories/GHSA-pq96-pwvg-vrr9 -~~	() https://github.com/fatedier/frp/security/advisories/GHSA-pq96-pwvg-vrr9 - Exploit, Vendor Advisory

21 Apr 2026, 21:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-04-21 21:16

Updated : 2026-04-29 23:20

NVD link : CVE-2026-40910

Mitre link : CVE-2026-40910

CVE.ORG link : CVE-2026-40910

JSON object : View

Products Affected

fatedier

frp

CWE

CWE-287

Improper Authentication

NVD-CWE-noinfo

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