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TI-2026-36800 Aliases CVE-2026-49957GHSA-5cwx-phm8-m83r

Hermes WebUI < 0.51.296 Workspace Boundary Bypass via api/workspace.py

Priority LOW 28CWE-22Published · Updated

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

Hermes WebUI before version 0.51.296 contains a workspace boundary bypass vulnerability that allows authenticated attackers to circumvent blocked-root path checks by exploiting an early return in the SSH/remote terminal profile workspace resolution logic within _remote_terminal_workspace_candidate(). Attackers can configure a remote terminal working directory to a system directory such as /etc, causing the workspace resolution path to accept it as a trusted local workspace root before the _is_blocked_workspace_path() guard executes, enabling read access to local system files through workspace file-read helpers.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00421 36th percentileScored 2026-11-07
Fix Fixed hermes-webui (nesquena): 0.51.296

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

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 0.51.2960.51.296Patch availableCNA
  • hermes-webui Vendornesquena Affected before 0.51.296 Fixed in 0.51.296 Patch available CNA

Remediation

  • Fix · CNA hermes-webui (nesquena) Fixed in 0.51.296

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-49957
  2. 2026-10-03 Alias added: GHSA-5cwx-phm8-m83r

References

Patch 3

Other 1

  • 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