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CVE-2026-58123 PoC — Hermes WebUI < 0.51.788 Unauthenticated RCE via Terminal API

Source
https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-58123.yaml
Associated Vulnerability
Title: Hermes WebUI < 0.51.788 Unauthenticated RCE via Terminal API (CVE-2026-58123)
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.
Description
Hermes WebUI < 0.51.788 contains an unauthenticated remote code execution caused by improper access control in embedded terminal API endpoints, letting remote attackers execute arbitrary shell commands without credentials.
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