CVE-2026-79664

critical · 9.1

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.

9.1

CVSS

0.4%

EPSS (exploit prob.)

29th

EPSS percentile

2026-08-25

Published

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Weaknesses

CWE-613

References

https://github.com/lin-snow/Ech0/security/advisories/GHSA-fpw6-hrg5-q5x5
https://www.vulncheck.com/advisories/ech0-before-access-token-revocation-bypass
https://github.com/lin-snow/Ech0/security/advisories/GHSA-fpw6-hrg5-q5x5

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-79664