High severity · published Aug 31, 2026
CVE-2026-79744
MCPHub: Missing Authorization on `PUT /api/system-config` Lets Any Non-Admin Rewrite Global Security Configuration
8.8
CVSS
0.6%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 46% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MC
mcphub · samanhappy
< 1.0.29 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-79744
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-79744
github.com
https://github.com/samanhappy/mcphub/releases/tag/v1.0.29
github.com
https://github.com/samanhappy/mcphub/security/advisories/GHSA-4gc8-885f-qj36
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