Rowboat CVE-2026-6635

No vendor-released patch identified at time of analysis-the vendor did not respond to early disclosure. Organizations should immediately disable or remove the experimental tools_webhook component if not business-critical, as this eliminates the attack surface entirely. If tools_webhook functionality is required, implement strict network segmentation to restrict access to the /tools_webhook endpoint to trusted IP ranges only using firewall rules or reverse proxy ACLs (trade-off: limits legitimate remote access). Deploy a web application firewall (WAF) with custom rules to validate X-Tools-JWE header format and reject malformed or suspicious JWE tokens (trade-off: requires JWE schema knowledge and may cause false positives). Implement additional authentication layer at reverse proxy level (e.g., mutual TLS, IP allowlisting, or separate API key validation) before requests reach the vulnerable application (trade-off: adds infrastructure complexity). Monitor logs for unusual tool_call invocations or X-Tools-JWE header manipulation attempts. Consult the public exploit at https://github.com/Dave-gilmore-aus/security-advisories/blob/main/rowbat-advisory to understand specific attack patterns for detection signatures. Consider migrating to alternative webhook solutions if vendor remains unresponsive.