CVE-2026-29791: Agentgateway is missing parameter sanitization in MCP to OpenAPI conversion

March 5, 2026 (updated March 6, 2026)

When converting MCP tools/call request to OpenAPI request, input path, query, and header values are not sanitized.

References

github.com/advisories/GHSA-v2x6-wwfw-r2rq
github.com/agentgateway/agentgateway
github.com/agentgateway/agentgateway/commit/9a5287569d892e77a8be8c3bb7bf3d7744244274
github.com/agentgateway/agentgateway/security/advisories/GHSA-v2x6-wwfw-r2rq
nvd.nist.gov/vuln/detail/CVE-2026-29791

Code Behaviors & Features

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