GHSA-R7X9-8PH7-W8CG Cloudflare Agents SDK has Insecure Direct Object Reference (IDOR) via Header-Based Email Routing

Summary An Insecure Direct Object Reference CWE-639 has been found to exist in createHeaderBasedEmailResolver function within the Cloudflare Agents SDK. The issue occurs because the Message-ID and References headers are parsed to derive the target agentName and agentId without proper validation o...

CVE-2026-1664 Insecure Direct Object Reference (IDOR) via Header-Based Email Routing

Summary An Insecure Direct Object Reference has been found to exist in createHeaderBasedEmailResolver function within the Cloudflare Agents SDK. The issue occurs because the Message-ID and References headers are parsed to derive the target agentName and agentId without proper validation or origin...

CVE-2026-1664

Summary: CVE-2026-1664 affects Cloudflare Agents SDK prior to 0.3.7, due to an IDOR in header-based email routing. Root cause: createHeaderBasedEmailResolver() parses Message-ID and References to derive target agentName/agentId without cryptographic/origin verification, letting external headers s...