browserbase_stagehand_navigate

2 findings on this tool

1. highssrf surfacef-r8-browserbase_stagehand_navigate

   Tool `browserbase_stagehand_navigate` accepts an unconstrained URL / endpoint parameter

   The parameter(s) `url` look like URL or endpoint inputs but carry no `pattern` or `enum` constraint. An agent tricked by an indirect-injection payload can invoke this tool with an internal-service URL (e.g. `http://169.254.169.254/`) to exfiltrate cloud metadata, probe internal APIs, or pivot to services the host can reach but the caller cannot.

   fix: Constrain the URL parameter with an allow-list `enum`, or a `pattern` that restricts scheme and domain. Validate server-side against an allow-list and reject private / loopback / link-local address ranges at the HTTP client level.

   OWASP LLM07NIST MANAGE-2.2ATLAS T0051CAST-02
2. mediumunconstrained inputf-r1-browserbase_stagehand_navigate

   Tool `browserbase_stagehand_navigate` accepts unconstrained string input

   The following string parameter(s) have no `maxLength` constraint: `url`. Unbounded strings let an attacker stuff arbitrary payloads through the tool, including indirect-injection content.

   fix: Add a `maxLength` to each string property, or constrain with an `enum` or `pattern`. Most legitimate tool inputs fit under a few hundred bytes.

   OWASP LLM01NIST MEASURE-2.3ATLAS T0051CAST-03