CVE-2026-49957 (GCVE-0-2026-49957)
Vulnerability from cvelistv5 – Published: 2026-06-09 16:25 – Updated: 2026-11-08 14:04 X_Open Source
VLAI
EPSS
VEX
Title
Hermes WebUI < 0.51.296 Workspace Boundary Bypass via api/workspace.py
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.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-09 20:21 UTC
CWE
- CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
VulnCheck
CNA
References
5 references
| URL | Tags |
|---|---|
| https://github.com/nesquena/hermes-webui/releases… | release-notes |
| https://github.com/nesquena/hermes-webui/pull/3731 | issue-trackingpatch |
| https://github.com/nesquena/hermes-webui/pull/3744 | issue-trackingpatch |
| https://github.com/nesquena/hermes-webui/commit/9… | patch |
| https://www.vulncheck.com/advisories/hermes-webui… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| nesquena | hermes-webui |
Affected:
0 , < 0.51.296
(semver)
cpe:2.3:a:get-hermes:hermes_web_ui:*:*:*:*:*:*:*:* |
Date Public
2026-06-06 00:00
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Browse all ATT&CK techniques and the vulnerabilities related to each.
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