CVE-2026-105806 Payload: Improper access control for MCP API keys
An authenticated user can manage MCP API keys outside their account, leading to privilege escalation and account takeover in Payload CMS.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-105806?
CVE-2026-105806 is a high-severity missing authorization vulnerability in @payloadcms payload, published on 6 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Payload is a free and open source headless content management system. In @payloadcms/plugin-mcp versions from 3.61.0 until 3.88.0, an authenticated user can manage MCP API keys outside the intended account, enabling privilege escalation through account takeover. This issue is fixed in version 3.88.0.
Weakness: CWE-862
Which versions are affected by CVE-2026-105806?
2 open source packages ship an affected version, including @payloadcms/plugin-mcp.
| Package | Affected | Fixed in |
|---|---|---|
@payloadcms/plugin-mcp npm | From 3.61.0 | 3.88.0 |
@payloadcms/plugin-mcp npm | From 3.61.0 | 3.88.0 |
How do I fix CVE-2026-105806?
Upgrade @payloadcms/plugin-mcp to 3.88.0 or later.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-105806 being exploited?
There is no known exploitation of CVE-2026-105806 in the wild and no public exploit code.
Sources
Also known as GHSA-2q76-m6w6-qgc6.