{"cve":"CVE-2026-79664","nvd":{"published":"2026-08-25T12:16:34.370","modified":"2026-09-23T18:14:58.577","status":"Awaiting Analysis","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.","cvss_v4":{"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","score":9.1},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","score":7.4},"cwes":["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"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:50:17.453294893+00:00"},"epss":{"cve":"CVE-2026-79664","score":0.00356,"percentile":0.2937,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-fpw6-hrg5-q5x5","url":"https://osv.dev/vulnerability/GHSA-fpw6-hrg5-q5x5","summary":"ech0's acess tokens with expiry=never cannot be revoked: logout panics, delete does not blacklist JTI","modified":"2026-08-27T04:10:39.179951772Z","packages":[{"ecosystem":"Go","name":"github.com/lin-snow/ech0","purl":"pkg:golang/github.com/lin-snow/ech0","ranges":["<1.4.8-0.20260503041146-eab62379c795"],"fixed":["1.4.8-0.20260503041146-eab62379c795"]}]},{"id":"GO-2026-5375","url":"https://osv.dev/vulnerability/GO-2026-5375","summary":"ech0's acess tokens with expiry=never cannot be revoked: logout panics, delete does not blacklist JTI in github.com/lin-snow/ech0","modified":"2026-08-27T04:10:39.179951772Z","packages":[{"ecosystem":"Go","name":"github.com/lin-snow/ech0","purl":"pkg:golang/github.com/lin-snow/ech0","ranges":["<1.4.8-0.20260503041146-eab62379c795"],"fixed":["1.4.8-0.20260503041146-eab62379c795"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}