CVE-2026-49957 | BDVDB-2026-339374 Detail
nesquenahermes-webui
Description#
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.
Impact#
Per CVSS v3.1: confidentiality impact high, integrity impact none, availability impact none. Attack vector: network.
Weaknesses#
- CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
References#
- https://github.com/nesquena/hermes-webui/releases/tag/v0.51.296
- https://github.com/nesquena/hermes-webui/pull/3731
- https://github.com/nesquena/hermes-webui/pull/3744
- https://github.com/nesquena/hermes-webui/commit/91a89fb5d5c0bf87932917f9914ad0150ea62fe4
- https://www.vulncheck.com/advisories/hermes-webui-workspace-boundary-bypass-via-api-workspace-py
Exploit#
No public exploit known
History#
- Version 1Record published in the CVE List.
- Version 2Most recent update recorded in the CVE List.