Authentication Bypass Vulnerability in IBM ContextForge MCP Gateway
CVE-2026-110195

5.4MEDIUM

Key Information:

Vendor

IBM
Status
Contextforge Mcp Gateway
Vendor
CVE Published:
13 November 2026

What is CVE-2026-110195?

The IBM ContextForge MCP Gateway versions 1.0.0 through 1.0.11 are susceptible to an authentication bypass vulnerability. This issue arises due to an inadequately defined cache key in the RFC 8693 token exchange cache, which permits an authenticated user to circumvent upstream credential-level authorization policies. As a result, the cached upstream bearer tokens can be reused across different credentials belonging to the same user, presenting a significant security risk. Users are advised to apply the latest patches to mitigate this vulnerability.

Affected Version(s)

ContextForge MCP Gateway 1.0.0 <= 1.0.11

References

https://www.ibm.com/support/pages/node/7296695
vendor-advisorypatch

CVSS V3.1

Score:
5.4
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

This vulnerability was reported to IBM by Nick Simpson.
.