CVE-2026-11918 IBM ContextForge MCP Gateway is affected by security filter bypass via nested payload structures
Authenticated users can bypass security filters in IBM ContextForge MCP Gateway by exploiting incomplete inspection of nested payloads.
- 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-2026-11918?
CVE-2026-11918 is a medium-severity vulnerability in IBM ContextForge MCP Gateway, published on 15 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
IBM ContextForge MCP Gateway <= v1.0.4 IBM mcp-context-forge could allow an authenticated user to bypass protection mechanisms due to incomplete recursive inspection of nested payload content.
Weakness: CWE-184
Which versions are affected by CVE-2026-11918?
How do I fix CVE-2026-11918?
No fix has been published for CVE-2026-11918 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-11918 being exploited?
There is no known exploitation of CVE-2026-11918 in the wild and no public exploit code.
Sources
Also known as GHSA-x4xw-xv9j-3c3q.