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CVE-2026-49956— Hermes WebUI < 0.51.269 Profile Isolation Bypass via sessions search

Quick assessment

Affected
nesquena hermes-webui
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
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之前版本存在安全漏洞，该漏洞源于配置文件隔离绕过问题，可能导致认证用户通过查询会话搜索端点访问其他配置文件的数据。

CVSS 6.5 · Medium EPSS 0.47% · P39

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage

Affected Version Matrix 1

VendorProduct Version RangeStatus
nesquena hermes-webui < 0.51.269 affected
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I. Basic Information for CVE-2026-49956

Vulnerability Information
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Vulnerability Title
Hermes WebUI < 0.51.269 Profile Isolation Bypass via sessions search
Source: CVE Program / CVE List V5
Vulnerability Description
Hermes WebUI before version 0.51.269 contains a profile isolation bypass vulnerability that allows authenticated users to access data belonging to other profiles by querying the session search endpoint without active-profile filtering. Attackers can send requests to the sessions search handler to retrieve session titles and transcript message content from profiles other than their own active profile.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
Hermes Web UI 安全漏洞
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之前版本存在安全漏洞，该漏洞源于配置文件隔离绕过问题，可能导致认证用户通过查询会话搜索端点访问其他配置文件的数据。
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 ~ 0.51.269 -

II. Public POCs for CVE-2026-49956

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III. Intelligence Information for CVE-2026-49956

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Patches & Fixes for CVE-2026-49956 (1)

Vendor Advisories for CVE-2026-49956 (1)

Vendor Pages for CVE-2026-49956 (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-2026-49957 7.7 HIGH Hermes WebUI < 0.51.296 Workspace Boundary Bypass via api/workspace.py
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-862

V. Comments for CVE-2026-49956

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