CVE-2026-58123

Critical

Description

Hermes WebUI before 0.51.788 contains an unauthenticated remote code execution vulnerability that allows remote attackers to execute arbitrary shell commands by accessing the embedded terminal API endpoints without credentials. Attackers can create a session, attach a PTY shell, and write arbitrary commands through the terminal input endpoint to achieve full command execution as the server process user via four sequential unauthenticated HTTP requests.

SeverityCritical

CVSS9.8

Exploit probability—

ProductNesquena Hermes-webui

PublishedJul 9, 2026

First seenJul 9, 2026

Weakness typeCWE-306Missing authentication for critical function

How to fix

Update

nesquena hermes-webui0.51.788 or later

Patches

github.com/nesquena/hermes-webui/commit/d257e5f36cfa9328600c8bde6f0de09a6ad9b6f4

Vendor advisories

github.com/nesquena/hermes-webui/releases/tag/v0.51.788

Affected products

Product	Affected versions	Fixed in
nesquena hermes-webui	v < 0.51.788	0.51.788

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