High 7.7Published Jun 9, 2026

CVE-2026-49957Hermes WebUI < 0.51.296 Workspace Boundary Bypass via api/workspace.py

Updated under an hour ago (Oct 27, 2026, 2:40 AM ET)

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It affects nesquena hermes-webui. Add what you run to find out whether that includes you.

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Exploited in the last 30 days

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.

CVSS: 7.7 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Weakness (CWE): CWE-22
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Deferred
Record last updated: Jul 14, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

nesquena hermes-webui nesquena:hermes_webui (from the name)	before 0.51.296	CNA record

References

References

https://github.com/nesquena/hermes-webui/releases/tag/v0.51.296	release-notes
https://github.com/nesquena/hermes-webui/pull/3731	issue-tracking
https://github.com/nesquena/hermes-webui/pull/3744	issue-tracking
https://github.com/nesquena/hermes-webui/commit/91a89fb5d5c0bf87932917f9914ad0150ea62fe4	patch
https://www.vulncheck.com/advisories/hermes-webui-workspace-boundary-bypass-via-api-workspace-py	third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.