CVE-2026-53869 – Hermes Agent < 0.16.0 – DNS Rebinding Bypass via WebSocket Endpoints

​CVE ID :CVE-2026-53869

Published : June 17, 2026, 5:57 p.m. | 43 minutes ago

Description :Hermes Agent before 0.16.0 contains a DNS rebinding vulnerability in WebSocket endpoints that allows remote attackers to bypass Host and Origin validation. FastAPI HTTP middleware does not execute for WebSocket upgrade requests on /api/pty, /api/ws, /api/pub, and /api/events endpoints, enabling attackers to exploit DNS rebinding and inject malicious commands or read terminal output.

Severity: 8.7 | HIGH

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