Vulnerability · Published Aug 31, 2026 · Assigned by GitHub_M

CVE-2026-79744MCPHub: Missing Authorization on `PUT /api/system-config` Lets Any Non-Admin Rewrite Global Security Configuration

High 8.8

In plain English

A high-severity privilege mismanagement in mcphub from samanhappy. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 46% of all known vulnerabilities).

Severity (CVSS 3.1)8.8High

Exploit odds (30 days)0.6%top 53.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

MCPHub is a unified hub for centrally managing and dynamically orchestrating multiple MCP servers/APIs into separate endpoints with flexible routing strategies. Prior to version 1.0.29, MCPHub's PUT /api/system-config endpoint (handler updateSystemConfig) performs no authorization check. It is protected only by the app-wide authentication middleware and a rate limiter — it never inspects req.user.isAdmin. This issue has been patched in version 1.0.29.

Affected products (as reported)

Vendor	Product	Versions
samanhappy	mcphub	< 1.0.29

Weakness: CWE-269, CWE-862 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

https://github.com/samanhappy/mcphub/security/advisories/GHSA-4gc8-885f-qj36 x_refsource_CONFIRM
https://github.com/samanhappy/mcphub/releases/tag/v1.0.29 x_refsource_MISC