CVE-2026-47769 - APIFold Vulnerable to Unauthenticated Webhook Event Injection

CVE-2026-47769 - APIFold Vulnerable to Unauthenticated Webhook Event Injection

https://cvefeed.io/rssfeed/latest.atom / Thu, 07/23/2026 - 22:07
CVE ID :CVE-2026-47769
Published : July 23, 2026, 6:16 p.m. | 33 minutes ago
Description :APIFold reads an OpenAPI 3.x or Swagger 2.x specification and generates a live, production-ready MCP server endpoint. Prior to commit 7f19b52280f414f57af2b79a95333d1c8fbeece5, the `/webhooks/:serverSlug/:eventName` endpoint accepts arbitrary unauthenticated JSON and stores it in Redis and the `webhook_events` PostgreSQL table without any signature check or authentication requirement. The root cause is that `createWebhookRouter` is called at `server.ts:188` without a `validators` map, so `receivers.ts:80`'s optional-chaining guard evaluates to `undefined` and the signature-validation block (`receiver.ts:81–95`) is unconditionally skipped. Any unauthenticated network client that knows a valid server slug can inject arbitrary payloads, which are subsequently served as trusted resource state to legitimate MCP clients. Commit 7f19b52280f414f57af2b79a95333d1c8fbeece5 patches the issue.
Severity: 5.3 | MEDIUM
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