---
id: CVE-2026-79669
title: >-
  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
summary: >-
  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,
  G…
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N'
cwe:
  - CWE-862
vendor: lin-snow
product: github.com/lin-snow/ech0
affected:
  - github.com/lin-snow/ech0 < 4.4.3
patched:
  - github.com/lin-snow/ech0 4.4.3
published: '2026-08-25'
updated: '2026-09-23'
sourceUpdated: '2026-09-23T18:14:58.577'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-79669'
references:
  - url: 'https://github.com/lin-snow/Ech0/security/advisories/GHSA-w8jj-cwmc-wgq2'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/ech0-before-missing-authorization-on-system-logs
    label: disclosure@vulncheck.com
  - url: 'https://github.com/lin-snow/Ech0/security/advisories/GHSA-w8jj-cwmc-wgq2'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: 'https://github.com/lin-snow/Ech0'
  - url: 'https://github.com/lin-snow/Ech0/releases/tag/v4.4.3'
tags:
  - nvd
  - osv
  - go
epss: 0.00168
epssPercentile: 0.0652
aliases:
  - GHSA-w8jj-cwmc-wgq2
  - GO-2026-5701
ecosystem: go
ingestedAt: '2026-08-27T19:27:47.724Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-79669)

Affected packages:

- `github.com/lin-snow/ech0 < 4.4.3`

Patched in:

- `github.com/lin-snow/ech0 4.4.3`

Source: https://osv.dev/vulnerability/GHSA-w8jj-cwmc-wgq2