Threats Tagged 'ghsa-6g2f-w7g3-77vf'

9router contains an incomplete fix for CVE-2026-46339 that allows bypassing a local-only access gate via spoofed Host and Origin headers when deployed behind reverse proxies or tunnels. The gate relies on these headers to determine local requests, which are attacker-controlled in proxied environments. An attacker who obtains or guesses a deterministic CLI token derived from the machine ID can bypass the gate and interact with MCP child processes, potentially achieving remote code execution. The vulnerability affects 9router versions up to 0.4.55. The severity is high due to the requirement of additional conditions like token access and proxied deployment.