CVE-2026-79750 Missing authorization in mcphub
Authenticated users can execute tools on other users' MCP servers, enabling cross-tenant file reads and SSRF due to missing ownership checks in the tool-execution API.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-79750?
CVE-2026-79750 is a high-severity missing authorization vulnerability in samanhappy mcphub, published on 31 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
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 1.0.30, MCPHub scopes non-admin users to servers they own (list views and config edits enforce ownership), but the tool-execution API does not. Any authenticated non-admin user can invoke tools on MCP servers owned by other users — servers they cannot even see in GET /api/servers. Because connected MCP servers carry real capability (filesystem, HTTP fetch, cloud APIs with the owner's keys), this is cross-tenant compromise: demonstrated arbitrary host file read (/etc/passwd, another user's secrets) and SSRF. This issue has been patched in version 1.0.30.
Weakness: CWE-639
Which versions are affected by CVE-2026-79750?
How do I fix CVE-2026-79750?
No fix has been published for CVE-2026-79750 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-79750 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-79750 exists.
Sources
Also known as GHSA-wfqf-hqwq-8wvf.