CVE-2026-110195

MEDIUM 5.4

IBM ContextForge MCP Gateway is affected by an authorization bypass vulnerability

CVSS Score

5.4

EPSS Score

0.0%

EPSS Percentile

0th

IBM ContextForge MCP Gateway 1.0.0 through 1.0.11 could allow an authenticated caller to bypass upstream credential-level authorization policies due to an insufficiently specific cache key in the RFC 8693 token exchange cache, enabling reuse of cached upstream bearer tokens across different credentials belonging to the same user.

CWE	CWE-287
Vendor	ibm
Product	contextforge mcp gateway
Published	Nov 13, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

None

Affected Versions

IBM / ContextForge MCP Gateway

1.0.0 ≤ 1.0.11

References

NVD ↗ CVE.org ↗ EPSS Data ↗

ibm.com: https://www.ibm.com/support/pages/node/7296695

Credits

This vulnerability was reported to IBM by Nick Simpson.