CVE-2026-94407
IBM ContextForge MCP Gateway is affected by a regular expression denial of service
CVSS Score
6.5
EPSS Score
0.0%
EPSS Percentile
0th
IBM ContextForge MCP Gateway 1.0.0 through 1.0.11 is potentially vulnerable to denial of service due to uncontrolled regular expression complexity (CWE-400 / ReDoS). An authenticated user with tool-registration privileges can embed catastrophically backtracking regex patterns in a tool's JSON Schema `pattern` field; when ContextForge validates arguments against that schema, the validation call may consume unbounded CPU, potentially degrading gateway availability.
| CWE | CWE-1333 |
| 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:N/I:N/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
IBM / ContextForge MCP Gateway
1.0.0 ≤ 1.0.11