Vulnerability · Published Mar 6, 2026 · Assigned by GitHub_M
CVE-2026-29791Agentgateway: Missing parameter sanitization in MCP to OpenAPI conversion
Medium 4.9
In plain English
A medium-severity improper input validation in agentgateway from agentgateway. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 6% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
Agentgateway is an open source data plane for agentic AI connectivity within or across any agent framework or environment. Prior to version 0.12.0, when converting MCP tools/call request to OpenAPI request, input path, query, and header values are not sanitized. This issue has been patched in version 0.12.0.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/agentgateway/agentgateway | 0.12.0 | GHSA-v2x6-wwfw-r2rq |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| agentgateway | agentgateway | < 0.12.0 |
Weakness: CWE-20 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N