CVE-2026-79664

High

Description

Ech0 before 4.7.3 fails to properly revoke access tokens created with never-expire option, allowing attackers to maintain perpetual authenticated access after token theft. Three independent revocation mechanisms fail: logout panics on nil ExpiresAt field, RevokeToken skips when remainTTL is zero, and admin delete does not blacklist the JTI, leaving stolen tokens cryptographically valid until JWT secret rotation.

SeverityHigh

CVSS7.4

Exploit probability—

ProductGithub.com/lin-snow/ech0

PublishedAug 25, 2026

First seenAug 25, 2026

Weakness typeCWE-613CWE-613

How to fix

Update

github.com/lin-snow/ech01.4.8-0.20260503041146-eab62379c795 or later

Vendor advisories

github.com/lin-snow/Ech0/security/advisories/GHSA-fpw6-hrg5-q5x5

Affected products

Product	Affected versions	Fixed in
github.com/lin-snow/ech0Go	v < 1.4.8-0.20260503041146-eab62379c795	1.4.8-0.20260503041146-eab62379c795

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