Security Advisory

CVE-2026-53869

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-06-17 17:57:30

Last updated 2026-06-18 15:29:39

Assigner VulnCheck

CVSS score 8.7

State PUBLISHED

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.

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