CVE-2026-49957
published 2026-06-09CVE-2026-49957: Hermes WebUI before version 0.51.296 contains a workspace boundary bypass vulnerability that allows authenticated attackers to circumvent blocked-root path…
PriorityP349high7.7CVSS 3.1
AVNACLPRLUINSCCHINAN
EPSS
0.42%
33.7th percentile
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.
Affected
1 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| nesquena | hermes-webui | < 0.51.296 | 0.51.296 |
CVSS provenance
nvdv3.17.7HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
nvdv4.06.3MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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VulDB
nesquena hermes-webui up to 0.51.295 Working Directory _remote_terminal_workspace_candidate path traversal
vuldb·2026-06-09·CVSS 7.7
CVE-2026-49957 [HIGH] nesquena hermes-webui up to 0.51.295 Working Directory _remote_terminal_workspace_candidate path traversal
A vulnerability, which was classified as critical, has been found in nesquena hermes-webui up to 0.51.295. This impacts the function _remote_terminal_workspace_candidate of the component Working Directory Handler. This manipulation causes path traversal.
This vulnerability is registered as CVE-2026-49957. Remote exploitation of the attack is possible. No exploit is available.
It is advisable to upgrade the affected component.
GHSA
Hermes WebUI before version 0.51.269 contains a workspace boundary bypass vulnerability that allows authenticated attackers to circumvent blocked-root path checks by exploiting an early return in the
ghsa_unreviewed·2026-06-09
CVE-2026-49957 [MEDIUM] CWE-22 Hermes WebUI before version 0.51.269 contains a workspace boundary bypass vulnerability that allows authenticated attackers to circumvent blocked-root path checks by exploiting an early return in the
Hermes WebUI before version 0.51.269 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.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
https://github.com/nesquena/hermes-webui/commit/91a89fb5d5c0bf87932917f9914ad0150ea62fe4https://github.com/nesquena/hermes-webui/pull/3731https://github.com/nesquena/hermes-webui/pull/3744https://github.com/nesquena/hermes-webui/releases/tag/v0.51.296https://www.vulncheck.com/advisories/hermes-webui-workspace-boundary-bypass-via-api-workspace-py
2026-06-09
Published