Authentication bypass in MCPHub

published 2026-04-14 6 mo ago modified 2026-10-14 25 d ago also GHSA-9vq7-9h42-j88h , EUVD-2025-209433

cvss: 5.3; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 29%
public exploits: 0; none known

MCPHub in versions below 0.11.0 is vulnerable to authentication bypass. Some endpoints are not protected by authentication middleware, allowing an unauthenticated attacker to perform actions in the name of other users and using their privileges.

Patch / fix

fixed in 2

npm @samanhappy/mcphub 0.11.0
MCPHub MCPHub 0.11.0

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 6 mo ago (2026-04-14)

Exploit prediction

0.35% chance of exploitation in the next 30 days, higher than 29% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	4.0	5.3	CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
CNA	4.0	5.3	CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
NVD	3.1	5.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Affected packages

ecosystem	package	affected	fixed in
npm	@samanhappy/mcphub	<0.11.0	0.11.0

Affected products

MCPHub MCPHub

Classification

Weakness

CWE-639 Authorization Bypass Through User-Controlled Key

References

github.com /samanhappy/mcphub
product, package
cert.pl /en/posts/2026/04/CVE-2025-13822
third-party-advisory, web
nvd.nist.gov /vuln/detail/CVE-2025-13822
advisory

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary