CVE-2026-110279

HIGH 8.1

IBM ContextForge MCP Gateway is affected by an improper authentication vulnerability

CVSS Score

8.1

EPSS Score

0.0%

EPSS Percentile

0th

IBM ContextForge MCP Gateway 1.0.0 through 1.1.0 is vulnerable to improper credential handling because the X-Upstream-Authorization request header can override the gateway-managed upstream credential for OAuth (authorization_code and client_credentials), bearer and basic authenticated gateways, which could allow an authenticated user to cause upstream requests to be made with a different credential and bypass per-user permission and audit attribution.

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:H/I:H/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

Affected Versions

IBM / ContextForge MCP Gateway

1.0.0 ≤ 1.1.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

ibm.com: https://www.ibm.com/support/pages/node/7296490

Credits

This vulnerability was reported to IBM by Wolfgang Kriesel.