Auth bypass in Lin-Snow Ech0
CVE-2026-79672
Ech0 before 4.4.3 fails to enforce scope-based authorization on nine comment panel admin endpoints, allowing access tokens with minimal scopes to perform full comment moderation operations. Attackers with a limited-scope access token can list, approve, reject, delete comments, and modify comment system settings by directly accessing the unprotected panel endpoints.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:N.
EPSS exploit prediction
EPSS: 0.003 (22.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 23rd percentile — 22.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001
Affected products
Weakness classification (CWE)
References
- github.com/lin-snow/Ech0/security/advisories/GHSA-fwg7-53p4-g33c (vendor-advisory)
- www.vulncheck.com/advisories/ech0-before-authentication-bypass-via-comment-panel (third-party-advisory)
Frequently asked questions
- What is CVE-2026-79672?
- CVE-2026-79672 is a medium-severity vulnerability in Lin-Snow Ech0, classified under Missing Authorization. CVSS score: 5.5/10. Published 2026-08-25.
- How severe is CVE-2026-79672?
- Medium severity. CVSS v3 base score is 5.5 out of 10.