CVE-2026-79664
Ech0 before 4.7.3 Access Token Revocation Bypass
- State
- Published
- Severity
- 9.1 Critical
- Published
- Aug 25, 2026
- Updated
- Oct 8, 2026
- Reserved
- Aug 25, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 9.1 Critical | CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 7.4 High | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N | VulnCheck |
Weaknesses
- CWE-613 Insufficient Session Expiration
Affected Products
| Product | Versions |
|---|---|
Ech0lin-snow |
|
References
- GitHub Security Advisory (GHSA-fpw6-hrg5-q5x5)vendor-advisory
- VulnCheck Advisory: Ech0 before 4.7.3 Access Token Revocation Bypassthird-party-advisory
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