Publish GHSA-v2x6-wwfw-r2rq

Author: advisory-database[bot]

advisories/github-reviewed/2026/03/GHSA-v2x6-wwfw-r2rq/GHSA-v2x6-wwfw-r2rq.json

@@ -0,0 +1,59 @@
+{
+  "schema_version": "1.4.0",
+  "id": "GHSA-v2x6-wwfw-r2rq",
+  "modified": "2026-03-05T01:02:48Z",
+  "published": "2026-03-05T01:02:47Z",
+  "aliases": [],
+  "summary": "Agentgateway is missing parameter sanitization in MCP to OpenAPI conversion",
+  "details": "### Summary\n\nWhen converting MCP `tools/call` request to OpenAPI request, input path, query, and header values are not sanitized.\n\n### Details\n\nWhen using the [MCP to OpenAPI](https://agentgateway.dev/docs/standalone/latest/mcp/connect/openapi/) feature, the proxy lacks proper sanitization of input parameters in the MCP call, allowing:\n* Injection of additional path or query parameters.\n* Injection of additional headers.\n\n### Impacted Versions\n\nThis vulnerability is fixed in Agentgateway v0.12.0+. Users on older versions are recommended to upgrade to v0.12.0+.\n\nThis feature only impacts usage of the [MCP to OpenAPI](https://agentgateway.dev/docs/standalone/latest/mcp/connect/openapi/) feature\n\n### Credits\n\nAgentgateway extends its thanks to @spacewander for the report!",
+  "severity": [
+    {
+      "type": "CVSS_V3",
+      "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N"
+    }
+  ],
+  "affected": [
+    {
+      "package": {
+        "ecosystem": "Go",
+        "name": "github.com/agentgateway/agentgateway"
+      },
+      "ranges": [
+        {
+          "type": "ECOSYSTEM",
+          "events": [
+            {
+              "introduced": "0"
+            },
+            {
+              "fixed": "0.12.0"
+            }
+          ]
+        }
+      ]
+    }
+  ],
+  "references": [
+    {
+      "type": "WEB",
+      "url": "https://github.com/agentgateway/agentgateway/security/advisories/GHSA-v2x6-wwfw-r2rq"
+    },
+    {
+      "type": "WEB",
+      "url": "https://github.com/agentgateway/agentgateway/commit/9a5287569d892e77a8be8c3bb7bf3d7744244274"
+    },
+    {
+      "type": "PACKAGE",
+      "url": "https://github.com/agentgateway/agentgateway"
+    }
+  ],
+  "database_specific": {
+    "cwe_ids": [
+      "CWE-20"
+    ],
+    "severity": "MODERATE",
+    "github_reviewed": true,
+    "github_reviewed_at": "2026-03-05T01:02:47Z",
+    "nvd_published_at": null
+  }
+}