CVE-2026-79665

8.7 highEPSS 0.5%

High (8.7). EPSS 0.5% chance of exploitation in the next 30 days.

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.

Severity

CVSS 4.0

8.7 high

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

CVSS 3.1

8.8 high

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.5% chance of exploitation in the next 30 days; higher than 43% of CVEs (scores of 2026-10-31)
CWE: CWE-862
Published: 2026-08-25
Modified: 2026-08-31
Record from: the NVD, synced 2026-10-19

References

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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