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

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-25 · updated 2026-08-31
Weakness: CWE-862

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.

Affected products

lin-snow Ech0: before 4.4.3 — fixed in 4.4.3

How to fix

Upgrade to a fixed version: lin-snow Ech0 4.4.3. Check the vendor advisory for mitigations.

References

https://github.com/lin-snow/Ech0/security/advisories/GHSA-cp79-9mwr-wr49
https://www.vulncheck.com/advisories/ech0-before-missing-authorization-via-dashboard-log-endpoints
https://github.com/lin-snow/Ech0/security/advisories/GHSA-cp79-9mwr-wr49

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