What is CVE-2026-11918?

CVE-2026-11918 is a medium-severity vulnerability in IBM Contextforge Mcp Gateway, classified under Incomplete List of Disallowed Inputs. CVSS score: 5.4/10. Published 2026-09-15.

How severe is CVE-2026-11918?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Vulnerability in IBM Contextforge Mcp Gateway

CVE-2026-11918

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.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N.

Affected products

Ibm Contextforge Mcp Gateway — versions <= v1.0.4

Weakness classification (CWE)

CWE-184 — Incomplete List of Disallowed Inputs

References

psirt@us.ibm.com (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-11918?: CVE-2026-11918 is a medium-severity vulnerability in IBM Contextforge Mcp Gateway, classified under Incomplete List of Disallowed Inputs. CVSS score: 5.4/10. Published 2026-09-15.
How severe is CVE-2026-11918?: Medium severity. CVSS v3 base score is 5.4 out of 10.