IBM ContextForge MCP Gateway is affected by an information exposure vulnerability

published 2026-11-13 yesterday modified 2026-11-13 yesterday also EUVD-2026-125802

cvss: 7.4; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.2%; EPSS 0.2% chance of exploitation in 30 days, percentile 15%
public exploits: 0; none known

IBM ContextForge MCP Gateway 1.0.0 through 1.1.0 could allow an attacker to replay identity propagation claims signatures or expose sensitive user identity information to third-party MCP servers due to static signature payloads and missing per-gateway configuration checks during tool invocation.

Patch / fix

links 1

ibm.com/support/pages/node/7296489 advisory

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Exploit prediction

0.24% chance of exploitation in the next 30 days, higher than 15% of all scored CVEs (FIRST EPSS, 2026-11-14).

CVSS scores

assigned by	version	score	vector
CNA	3.1	7.4	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
NVD	3.1	7.4	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Affected products

IBM ContextForge MCP Gateway

Classification

Weakness

CWE-294 Authentication Bypass by Capture-replay

References

ibm.com /support/pages/node/7296489
vendor-advisory, patch

Sources

CVE List CVE-2026-110278
NVD CVE-2026-110278

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