What’s Vulnerable › Vulnerabilities

CVE-2026-79669: Ech0 before 4.4.3 Missing Authorization on System Logs

• Severity: medium (CVSS 4.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-25 · updated 2026-09-23
• Weakness: CWE-862

Description

Ech0 before 4.4.3 lacks authorization checks on system log endpoints allowing any authenticated non-admin user to read and stream all server logs. Attackers can access historical logs and real-time log streams via GET /api/system/logs, GET /api/system/logs/stream, and WS /ws/system/logs to gather reconnaissance data including internal file paths, error stack traces, and application state.

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-w8jj-cwmc-wgq2
• https://www.vulncheck.com/advisories/ech0-before-missing-authorization-on-system-logs
• https://github.com/lin-snow/Ech0/security/advisories/GHSA-w8jj-cwmc-wgq2

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