PT-2026-56989 · Nesquena · Hermes-Webui

Katriel Moses + 1 · Published 2026-07-09 · Updated 2026-07-09 · CVE-2026-58123

Mitre

CVSS v3.1

9.8

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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.

Fix

Missing Authentication

Weakness Enumeration

CWE-306

Related Identifiers

CVE-2026-58123

Affected Products

Hermes-Webui

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2026-58123 · Security Note
• https://github.com/nesquena/hermes-webui/commit/d257e5f36cfa9328600c8bde6f0de09a6ad9b6f4 · Patch
• https://vulncheck.com/advisories/hermes-webui-unauthenticated-rce-via-terminal-api · Note
• https://github.com/nesquena/hermes-webui/pull/5268 · Note
• https://github.com/nesquena/hermes-webui/releases/tag/v0.51.788 · Note