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TI-2026-55165 Aliases CVE-2026-79667GHSA-vgpj-v99m-7h5j

Ech0 before 4.4.3 Authentication Bypass via Scope Enforcement

Priority HIGH 65CWE-285Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Security bypass
Confidentiality · integrity · availability
High · Low · Low
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-285.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00322 25th percentileScored 2026-11-07
Fix Fixed Ech0 (lin-snow): 4.4.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
lin-snowEch0before 4.4.34.4.3Patch availableCNA
  • Ech0 Vendorlin-snow Affected before 4.4.3 Fixed in 4.4.3 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:ech0:ech0:*:*:*:*:*:*:*:*——lin-snow
  • cpe:2.3:a:ech0:ech0:*:*:*:*:*:*:*:* Versions — — ·lin-snow

Remediation

  • Fix · CNA Ech0 (lin-snow) Fixed in 4.4.3

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    lin-snow Ech0 4.4.3

    7 records Highest priority Priority HIGH 1 HIGH, 5 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2026-55170 Ech0 before 4.4.3 Authentication Bypass via Comment PanelPriority MEDIUM 64
    • TI-2026-55164 Ech0 before 4.4.3 Missing Authorization via dashboard log endpointsPriority MEDIUM 64
    • TI-2026-55167 Ech0 before 4.4.3 Missing Authorization on System LogsPriority MEDIUM 57
    Show all 7 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-79667
  2. 2026-10-03 Alias added: GHSA-vgpj-v99m-7h5j

References

Advisory 1

  • TI-2026-55162 Ech0 before 4.7.3 Access Token Revocation Bypass CVSS 4.0CRITICAL 9.1
  • TI-2026-55163 Ech0 before 4.5.1 Authorization Bypass via Session Tokens CVSS 4.0HIGH 8.7
  • TI-2026-55160 Ech0 before 4.7.3 OAuth Redirect URI Validation Bypass CVSS 4.0HIGH 8.8
  • TI-2026-27239 Ech0 Affected by Unauthenticated Server-Side Request Forgery in Website Preview Feature CVSS 3.1HIGH 7.5
  • TI-2026-27240 Ech0 affected by unauthenticated SSRF in GetWebsiteTitle allows access to internal services and cloud metadata CVSS 3.1HIGH 7.2
  • TI-2026-55159 Ech0 before 4.7.3 Unauthenticated fav_count Modification CVSS 4.0MEDIUM 6.9
See all 19 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences