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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| nesquena | hermes-webui | < 0.51.788 | 0.51.788 |
Automated scanner template
A ready-made Nuclei template detects this vulnerability automatically. Vulnerabilities with public scanner templates are typically probed across the internet soon after the template appears — exposed systems should be patched first.
- Hermes WebUI < 0.51.788 - Remote Code Execution http/cves/2026/CVE-2026-58123.yaml
Source: projectdiscovery/nuclei-templates (MIT) — updated daily. Only links are listed.
References
- hermes-webui 0.51.788 Release Notes release-notes
- Pull Request issue-tracking patch
- Patch Commit patch
- https://www.vulncheck.com/advisories/hermes-webui-unauthenticated-rce-via-terminal-api third-party-advisory