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

Quick assessment

Affected
nesquena hermes-webui
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Hermes Web UI是Nathan Esquenazi个人开发者的一个轻量级、暗色主题的自主智能体Web界面。 Hermes Web UI 0.51.269之前版本存在路径遍历漏洞，该漏洞源于工作空间边界绕过问题，可能导致认证攻击者通过利用远程终端工作空间解析逻辑中的早期返回绕过根路径检查，从而读取本地系统文件。

CVSS 7.7 · High EPSS 0.51% · P41

Affected Version Matrix 1

VendorProduct Version RangeStatus
nesquena hermes-webui < 0.51.296 affected
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I. Basic Information for CVE-2026-49957

Vulnerability Information
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Vulnerability Title
Hermes WebUI < 0.51.296 Workspace Boundary Bypass via api/workspace.py
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
Hermes Web UI 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Hermes Web UI是Nathan Esquenazi个人开发者的一个轻量级、暗色主题的自主智能体Web界面。 Hermes Web UI 0.51.269之前版本存在路径遍历漏洞，该漏洞源于工作空间边界绕过问题，可能导致认证攻击者通过利用远程终端工作空间解析逻辑中的早期返回绕过根路径检查，从而读取本地系统文件。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
nesquena hermes-webui 0 ~ 0.51.296 -

II. Public POCs for CVE-2026-49957

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 10601 chars
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In-depth vulnerability mechanism
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POC zip download
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III. Intelligence Information for CVE-2026-49957

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Patches & Fixes for CVE-2026-49957 (3)

News Coverage for CVE-2026-49957 (1)

Other References for CVE-2026-49957 (1)

Same Patch Batch · nesquena · 2026-06-09 · 5 CVEs total

CVE-2026-49959 8.8 HIGH Hermes WebUI < 0.51.311 RCE via Git Configuration Injection
CVE-2026-49956 6.5 MEDIUM Hermes WebUI < 0.51.269 Profile Isolation Bypass via sessions search
CVE-2026-49955 5.3 MEDIUM Hermes WebUI < 0.51.270 Resource Exhaustion via passkey/options
CVE-2026-49958 5.0 MEDIUM Hermes WebUI < 0.51.303 TOCTOU Race Condition via git_discard

IV. Related Vulnerabilities

Same product: hermes-webui
Same vendor: nesquena
Same weakness: CWE-22

V. Comments for CVE-2026-49957

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