What is CVE-2026-40910?

CVE-2026-40910 is a medium-severity vulnerability in Fatedier Frp, classified under Improper Authentication. CVSS score: 6.5/10. Published 2026-04-21.

How severe is CVE-2026-40910?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Auth bypass in Fatedier Frp

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 f…

Vulnerability class: Broken Authentication

EPSS: 0.001 (22.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N.

Affected products

Fatedier Frp — versions < 0.68.1

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

https://github.com/fatedier/frp/security/advisories/GHSA-pq96-pwvg-vrr9 (x_refsource_CONFIRM, Exploit, Vendor Advisory)

Frequently asked questions

What is CVE-2026-40910?: CVE-2026-40910 is a medium-severity vulnerability in Fatedier Frp, classified under Improper Authentication. CVSS score: 6.5/10. Published 2026-04-21.
How severe is CVE-2026-40910?: Medium severity. CVSS v3 base score is 6.5 out of 10.