Read the docs
TI-2026-41857 Aliases CVE-2026-58123GHSA-ph29-g65g-m574

Hermes WebUI < 0.51.788 Unauthenticated RCE via Terminal API

Priority MEDIUM 56CWE-306Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-306.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.04649 91st percentileScored 2026-11-07
Fix Fixed hermes-webui (nesquena): 0.51.788

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
nesquenahermes-webuibefore 0.51.7880.51.788Patch availableCNA
  • hermes-webui Vendornesquena Affected before 0.51.788 Fixed in 0.51.788 Patch available CNA

Remediation

  • Fix · CNA hermes-webui (nesquena) Fixed in 0.51.788

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-58123
  2. 2026-10-03 Alias added: GHSA-ph29-g65g-m574

References

Patch 1

Other 2

  • TI-2026-36807 Hermes WebUI < 0.51.358 Unauthenticated Password Takeover via /api/settings CVSS 4.0CRITICAL 9.2
  • TI-2026-39885 Hermes WebUI < 0.51.468 - Resource Exhaustion via Unauthenticated OAuth Flow Endpoint CVSS 4.0MEDIUM 6.9
  • TI-2026-39878 Hermes WebUI < 0.51.443 - Cross-Profile Session Data Exfiltration via Session Export Endpoint CVSS 4.0HIGH 7.1
  • TI-2026-39877 Hermes WebUI < 0.51.443 - Broken Access Control in /api/session Endpoint CVSS 4.0HIGH 7.1
  • TI-2026-36799 Hermes WebUI < 0.51.269 Profile Isolation Bypass via sessions search CVSS 4.0HIGH 7.1
  • TI-2026-09773 Hermes WebUI before 0.51.221 Path Traversal via Symlink Workspace Bypass CVSS 4.0HIGH 7.1
See all 16 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences