CVE-2026-55205— Hermes WebUI < 0.51.468 - Resource Exhaustion via Unauthenticated OAuth Flow Endpoint
Affected Version Matrix 2
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| nesquena | hermes-webui | < 0.51.468 | affected |
0.51.468 | unaffected |
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I. Basic Information for CVE-2026-55205
Vulnerability Information
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Vulnerability Title
Hermes WebUI < 0.51.468 - Resource Exhaustion via Unauthenticated OAuth Flow Endpoint
Source: CVE Program / CVE List V5
Vulnerability Description
Hermes WebUI before 0.51.468 contains a resource exhaustion vulnerability in the unauthenticated POST /api/onboarding/oauth/start endpoint that allows unbounded accumulation of in-memory flow state and daemon threads. Attackers can send repeated or concurrent requests to exhaust server memory and thread resources, potentially triggering repeated outbound device-code requests to upstream OAuth providers.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
不加限制或调节的资源分配
Source: CVE Program / CVE List V5
Vulnerability Title
Nathan Esquenazi Hermes Web UI 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
nesquena hermes-webui是nesquena的消息队列组件。 Nathan Esquenazi Hermes Web UI 0.51.468之前版本存在资源管理错误漏洞，该漏洞源于未经身份验证的POST /api/onboarding/oauth/start端点存在资源耗尽漏洞，可能导致攻击者通过发送重复或并发请求耗尽服务器内存和线程资源，并可能触发向上游OAuth提供商重复发送出站设备代码请求。
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 ~ 0.51.468 | - |
II. Public POCs for CVE-2026-55205
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2026-55205 (3)
Vendor Advisories for CVE-2026-55205 (1)
Other References for CVE-2026-55205 (1)
- 🔗 Release v0.51.468 · nesquena/hermes-webui · GitHubrelease-notes
IV. Related Vulnerabilities
Same product: hermes-webui
- CVE-2026-58122
Hermes WebUI < 0.51.307 Authentication Bypass via X-Forwarde - CVE-2026-58123
Hermes WebUI < 0.51.788 Unauthenticated RCE via Terminal API - CVE-2026-58174
Hermes WebUI < 0.51.521 - Cross-Profile Authorization Bypass - CVE-2026-55198
Hermes WebUI < 0.51.443 - Cross-Profile Session Data Exfiltr - CVE-2026-55197
Hermes WebUI < 0.51.443 - Broken Access Control in /api/sess
Same vendor: nesquena
- CVE-2026-58122
Hermes WebUI < 0.51.307 Authentication Bypass via X-Forwarde - CVE-2026-58123
Hermes WebUI < 0.51.788 Unauthenticated RCE via Terminal API - CVE-2026-58174
Hermes WebUI < 0.51.521 - Cross-Profile Authorization Bypass - CVE-2026-55198
Hermes WebUI < 0.51.443 - Cross-Profile Session Data Exfiltr - CVE-2026-55197
Hermes WebUI < 0.51.443 - Broken Access Control in /api/sess
Same weakness: CWE-770
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vm2: bufferAllocLimit cap bypassed by Buffer.concat and Buff - CVE-2026-75050
JetBrains YouTrack 多个版本 DoS 漏洞 - CVE-2026-74878
openssl_encrypt before 1.4.0 TOTP Rate Limiter Bypass - CVE-2026-72888
Net::OAuth versions before 0.32 for Perl allow memory exhaus - CVE-2026-74788
Scriban before 7.0.0 Denial of Service via string.pad_left/p
V. Comments for CVE-2026-55205
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