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.
History

Tue, 25 Aug 2026 13:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Tue, 25 Aug 2026 11:45:00 +0000

Type Values Removed Values Added
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.
Title Ech0 before 4.7.3 Access Token Revocation Bypass
First Time appeared Ech0
Ech0 ech0
Weaknesses CWE-613
CPEs cpe:2.3:a:ech0:ech0:*:*:*:*:*:*:*:*
Vendors & Products Ech0
Ech0 ech0
References
Metrics cvssV3_1

{'score': 7.4, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N'}

cvssV4_0

{'score': 9.1, 'vector': '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'}


cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-08-25T13:01:48.306Z

Reserved: 2026-08-25T11:09:11.171Z

Link: CVE-2026-79664

cve-icon Vulnrichment

Updated: 2026-08-25T13:01:44.235Z

cve-icon NVD

Status : Received

Published: 2026-08-25T12:16:34.370

Modified: 2026-08-25T13:19:32.780

Link: CVE-2026-79664

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-25T13:00:14Z