Vulnerability 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.
CVSS Score
CRITICAL
Related Weaknesses (CWE)
References
- https://github.com/nesquena/hermes-webui/commit/d257e5f36cfa9328600c8bde6f0de09a
- https://github.com/nesquena/hermes-webui/pull/5268
- https://github.com/nesquena/hermes-webui/releases/tag/v0.51.788
- https://www.vulncheck.com/advisories/hermes-webui-unauthenticated-rce-via-termin
FAQ
What is CVE-2026-58123?
CVE-2026-58123 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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 end...
How severe is CVE-2026-58123?
CVE-2026-58123 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-58123?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.