CVE-2026-29791

Agentgateway: Missing parameter sanitization in MCP to OpenAPI conversion

State: Published
Severity: 4.9 Medium
Published: Mar 6, 2026
Updated: Mar 9, 2026
Reserved: Mar 4, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	4.9 Medium	CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N	GitHub_M

Weaknesses

CWE-20 Improper Input Validation

Affected Products

Product	Versions
agentgatewayagentgateway	< 0.12.0Affected

References

https://github.com/agentgateway/agentgateway/security/advisories/GHSA-v2x6-wwfw-r2rq

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