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Vulnerability record · CVE-2026-79665 · published 25 August 2026

CVE-2026-79665: Missing authorization vulnerability

Ech0 before 4.5.1 contains an authorization bypass vulnerability where session tokens skip scope validation in RequireScopes middleware, allowing logged-in non-admin users to access admin endpoints. Attackers can read system logs, visitor statistics, user emails, and subscribe to live WebSocket logs by sending authenticated session tokens to unprotected endpoints.

8.7 CVSS 4.0 High EPSS 0.51% · top 58.8% CWE-862 · Missing authorization Deferred
8.7CVSS 4.0 base score
0.51%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
31 Aug 2026Last modified by NVD

Description

Ech0 before 4.5.1 contains an authorization bypass vulnerability where session tokens skip scope validation in RequireScopes middleware, allowing logged-in non-admin users to access admin endpoints. Attackers can read system logs, visitor statistics, user emails, and subscribe to live WebSocket logs by sending authenticated session tokens to unprotected endpoints.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://github.com/lin-snow/Ech0/security/advisories/GHSA-hmmq-qh6g-6wgh
https://www.vulncheck.com/advisories/ech0-before-authorization-bypass-via-session-tokens
https://github.com/lin-snow/Ech0/security/advisories/GHSA-hmmq-qh6g-6wgh

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Source: NIST National Vulnerability Database (record CVE-2026-79665), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.