Is CVE-2026-53869 actively exploited?

No active exploitation of CVE-2026-53869 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-53869 be exploited remotely?

Yes. CVE-2026-53869 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-53869?

CVE-2026-53869 has a CVSS score of 7.5 (HIGH).

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HIGH

CVE-2026-53869

CWE-306Published: June 17, 2026· Updated: Jun 18, 2026

7.5

CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2026-53869 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.