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CVE-2026-79666— Ech0 before 4.4.3 Missing Authorization via dashboard log endpoints

Quick assessment

Affected
lin-snow Ech0
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.

L1nSn0w Ech0是L1nSn0w个人开发者的一款功能综合的实用工具。 L1nSn0w Ech0 4.4.3之前版本存在授权问题漏洞，该漏洞源于未能对仪表板日志端点强制执行管理员授权，导致任何已认证用户均可访问系统日志，攻击者可通过有效用户会话查询GET /api/system/logs并订阅日志流，获取包括文件路径、堆栈跟踪和内部URL在内的敏感操作数据。

CVSS 6.5 · Medium EPSS 0.39% · P31

Possible ATT&CK Techniques 1 AI

T1005 · Data from Local System

Affected Version Matrix 2

VendorProduct Version RangeStatus
lin-snow Ech0 < 4.4.3 affected
4.4.3 unaffected
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I. Basic Information for CVE-2026-79666

Vulnerability Information
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Vulnerability Title
Ech0 before 4.4.3 Missing Authorization via dashboard log endpoints
Source: CVE Program / CVE List V5
Vulnerability Description
Ech0 before 4.4.3 fails to enforce administrator authorization on dashboard log endpoints, allowing any authenticated user to access system logs. Attackers with valid user sessions can query GET /api/system/logs and subscribe to SSE and WebSocket log streams to retrieve sensitive operational data including file paths, stack traces, and internal URLs.
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
L1nSn0w Ech0 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
L1nSn0w Ech0是L1nSn0w个人开发者的一款功能综合的实用工具。 L1nSn0w Ech0 4.4.3之前版本存在授权问题漏洞，该漏洞源于未能对仪表板日志端点强制执行管理员授权，导致任何已认证用户均可访问系统日志，攻击者可通过有效用户会话查询GET /api/system/logs并订阅日志流，获取包括文件路径、堆栈跟踪和内部URL在内的敏感操作数据。
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
lin-snow Ech0 0 ~ 4.4.3 -

II. Public POCs for CVE-2026-79666

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III. Intelligence Information for CVE-2026-79666

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Vendor Advisories for CVE-2026-79666 (2)

Same Patch Batch · lin-snow · 2026-08-25 · 16 CVEs total

CVE-2026-79665 8.8 HIGH Ech0 before 4.5.1 Authorization Bypass via Session Tokens
CVE-2026-79662 8.0 HIGH Ech0 before 4.7.3 OAuth Redirect URI Validation Bypass
CVE-2026-79659 7.7 HIGH Ech0 before 4.7.3 Server-Side Request Forgery via fetchPeerConnectInfo
CVE-2026-79667 7.6 HIGH Ech0 before 4.4.3 Authentication Bypass via Scope Enforcement
CVE-2026-79658 7.5 HIGH Ech0 before 5.0.1 Denial of Service via Accept-Language
CVE-2026-79664 7.4 HIGH Ech0 before 4.7.3 Access Token Revocation Bypass
CVE-2026-79673 6.5 MEDIUM Ech0 before 4.4.3 Scope Bypass via profile:read Token
CVE-2026-79661 6.5 MEDIUM Ech0 before 4.7.3 Unauthenticated fav_count Modification
CVE-2026-79672 5.5 MEDIUM Ech0 before 4.4.3 Authentication Bypass via Comment Panel
CVE-2026-79671 5.5 MEDIUM Ech0 before 4.4.3 SSRF via DNS Resolution Bypass
CVE-2026-79660 5.3 MEDIUM Ech0 before 4.7.3 Email Disclosure via Public API
CVE-2026-79668 5.3 MEDIUM Ech0 before 4.7.3 Unauthenticated Like Endpoint Metric Inflation
CVE-2026-79670 4.8 MEDIUM Ech0 before 4.4.3 Stored XSS via SVG Upload
CVE-2026-79663 4.8 MEDIUM Ech0 before 4.7.3 Stored XSS via RSS feed tag names
CVE-2026-79669 4.3 MEDIUM Ech0 before 4.4.3 Missing Authorization on System Logs

IV. Related Vulnerabilities

Same product: Ech0
Same vendor: lin-snow
Same weakness: CWE-862

V. Comments for CVE-2026-79666

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