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CVE-2026-79664

7.4 · HIGH

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.

Published Aug 25, 2026CWE-613EPSS 0.27%

Overview

CVE-2026-79664 is a high-severity vulnerability. It was published on August 25, 2026 and has a CVSS 3.1 base score of 7.4 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.4, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/lin-snow/Ech0/security/advisories/GHSA-fpw6-hrg5-q5x5Refwww.vulncheck.com/advisories/ech0-before-access-token-revocation-bypassGitHubgithub.com/lin-snow/Ech0/security/advisories/GHSA-fpw6-hrg5-q5x5

How CyberStrike helps

Frequently asked questions

What is CVE-2026-79664?

CVE-2026-79664 is a high-severity vulnerability. It was published on August 25, 2026 and has a CVSS 3.1 base score of 7.4 (HIGH).

How severe is CVE-2026-79664?

This vulnerability has a CVSS 3.1 base score of 7.4, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-79664?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-79664?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-79664 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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