Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-79667— Ech0 before 4.4.3 Authentication Bypass via Scope Enforcement

Quick assessment

Affected
lin-snow Ech0
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.

L1nSn0w Ech0是L1nSn0w个人开发者的一款功能综合的实用工具。 L1nSn0w Ech0 4.3.4及之前版本存在授权问题漏洞，该漏洞源于对访问令牌作用域限制执行不当，多个特权端点缺少作用域检查，仅基于管理员角色进行授权，可能导致权限提升，读取收件箱并导出完整数据库备份ZIP归档。

CVSS 7.6 · High EPSS 0.32% · P23

Possible ATT&CK Techniques 1 AI

T1078 · Valid Accounts

Affected Version Matrix 2

VendorProduct Version RangeStatus
lin-snow Ech0 < 4.4.3 affected
4.4.3 unaffected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-79667

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Ech0 before 4.4.3 Authentication Bypass via Scope Enforcement
Source: CVE Program / CVE List V5
Vulnerability Description
Ech0 version 4.3.4 and earlier fails to reliably enforce scoped access token (least-privilege) restrictions on several privileged admin routes. Multiple privileged endpoints (e.g., /api/inbox, /api/panel/comments, /api/backup/export) omit scope checks and authorize based only on the user's admin role, and the backup export handler discards token scope metadata entirely. An attacker holding a deliberately limited (low-scope) admin access token can reach broader privileged functionality than intended, including reading the inbox and exporting a full database backup ZIP archive. Fixed in 4.4.3.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不恰当
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 4.3.4及之前版本存在授权问题漏洞，该漏洞源于对访问令牌作用域限制执行不当，多个特权端点缺少作用域检查，仅基于管理员角色进行授权，可能导致权限提升，读取收件箱并导出完整数据库备份ZIP归档。
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-2026-79667

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 9245 chars
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
100+ AI POC generations per month

III. Intelligence Information for CVE-2026-79667

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-79667 (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-2026-79658 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-2026-79666 6.5 MEDIUM Ech0 before 4.4.3 Missing Authorization via dashboard log endpoints
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-285

V. Comments for CVE-2026-79667

No comments yet

Leave a comment