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.
Ech0 版本 4.3.4 及更早版本未能可靠地实施基于作用域（最小权限原则）的访问令牌限制，导致多个特权管理接口存在越权访问漏洞。多个特权端点（例如 /api/inbox、/api/panel/comments、/api/backup/export）未进行作用域校验，仅依赖用户的管理员角色进行授权；此外，备份导出处理程序完全忽略了令牌的 scope 元数据。攻击者持有一个刻意限制作用域（低权限）的管理员访问令牌，仍可访问超出预期的更广泛特权功能，包括读取收件箱以及导出完整的数据库备份 ZIP 文件。该问题已在版本
Possible ATT&CK Techniques 1 AI
T1078 · Valid Accounts
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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.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
Affected Products
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
-
CVE-2026-79673
Ech0 before 4.4.3 Scope Bypass via profile:read Token -
CVE-2026-79672
Ech0 before 4.4.3 Authentication Bypass via Comment Panel -
CVE-2026-79671
Ech0 before 4.4.3 SSRF via DNS Resolution Bypass -
CVE-2026-79670
Ech0 before 4.4.3 Stored XSS via SVG Upload -
CVE-2026-79669
Ech0 before 4.4.3 Missing Authorization on System Logs
Same vendor: lin-snow
-
CVE-2026-79673
Ech0 before 4.4.3 Scope Bypass via profile:read Token -
CVE-2026-79672
Ech0 before 4.4.3 Authentication Bypass via Comment Panel -
CVE-2026-79671
Ech0 before 4.4.3 SSRF via DNS Resolution Bypass -
CVE-2026-79670
Ech0 before 4.4.3 Stored XSS via SVG Upload -
CVE-2026-79669
Ech0 before 4.4.3 Missing Authorization on System Logs
Same weakness: CWE-285
-
CVE-2026-70665
Doorkeeper OpenID Connect: DCR endpoint persists unvalidated -
CVE-2026-66422
Apache Tomcat: Servlet role references can bypass declarativ -
CVE-2026-55571
djust authentication bypass: a login_required / on_mount Liv -
CVE-2026-78158
Open5GS AMF UEContextReleaseRequest Path improper authorizat -
CVE-2026-78115
SourceCodester Class and Exam Timetabling System User Accoun
V. Comments for CVE-2026-79667
No comments yet