CVE-2026-79664Ech0 before 4.7.3 Access Token Revocation Bypass
Updated under an hour ago ()
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It affects lin-snow Ech0. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.4 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
- Weakness (CWE)
- CWE-613
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Awaiting Analysis
- Record last updated
- Oct 8, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
lin-snow Ech0 lin_snow:ech0 (from the name) | before 4.7.3; 4.7.3 not affected | CNA record |
References
- https://github.com/lin-snow/Ech0/security/advisories/GHSA-fpw6-hrg5-q5x5vendor-advisory
- https://www.vulncheck.com/advisories/ech0-before-access-token-revocation-bypassthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.