CVE ID :CVE-2026-9739 Published : May 27, 2026, 11:16 p.m. | 14 minutes ago Description :Vulnerable to DNS rebinding attacks when using SSE (http://b/499408790). During the beta phase, we implemented `allowed-origins` and `allowed-hosts` flags to align with MCP security guidelines. However, the hardcoded `Access-Control-Allow-Origin: *` header in the SSE initialization handler was inadvertently retained. This vulnerability specifically impacts users connecting via Toolbox using SSE under specification v2024-11-05. Severity: 9.4 | CRITICAL Visit the link for more details, such as CVSS details, affected products, timeline, and more...