IBM ContextForge MCP Gateway is affected by a denial of service due to an incomplete list of disallowed jq inputs

published 2026-11-13 yesterday modified 2026-11-13 yesterday also EUVD-2026-125805

cvss: 6.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.5%; EPSS 0.5% chance of exploitation in 30 days, percentile 41%
public exploits: 0; none known

IBM ContextForge MCP Gateway 1.0.8 through 1.0.11, and v1.1.0 is vulnerable to denial of service due to an incomplete denylist in the jq filter guard module (CWE-184). An authenticated remote attacker can supply a crafted `jsonpath_filter` value containing `halt`, `halt_error`, or unbounded-loop built-ins that bypass the safety check, causing gateway worker process termination or sustained resource exhaustion.

Patch / fix

links 1

ibm.com/support/pages/node/7296697 advisory

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Exploit prediction

0.48% chance of exploitation in the next 30 days, higher than 41% of all scored CVEs (FIRST EPSS, 2026-11-14).

CVSS scores

assigned by	version	score	vector
CNA	3.1	6.5	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD	3.1	6.5	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products

IBM ContextForge MCP Gateway

Classification

Weakness

CWE-184 Incomplete List of Disallowed Inputs

References

ibm.com /support/pages/node/7296697
vendor-advisory, patch

Sources

CVE List CVE-2026-110189
NVD CVE-2026-110189

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