NVD

CVE-2026-79664 Detail

Received

This CVE record has recently been published to the CVE List and has been included within the NVD dataset.

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.

Metrics

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.

CVSS 4.0 Severity and Vector Strings:

NIST: NVD

N/A

NVD assessment not yet provided.

Nist CVSS score does not match with CNA score

CNA: VulnCheck

CVSS-B 9.1 CRITICAL

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

CVSS 3.x Severity and Vector Strings:

CNA: VulnCheck

Base Score: 7.4 HIGH

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

CVSS 2.0 Severity and Vector Strings:

National Institute of Standards and Technology

NIST: NVD

Base Score: N/A

NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/lin-snow/Ech0/security/advisories/GHSA-fpw6-hrg5-q5x5	CISA-ADP, VulnCheck
https://www.vulncheck.com/advisories/ech0-before-access-token-revocation-bypass	VulnCheck

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-613	Insufficient Session Expiration	VulnCheck

Change History

2 change records found show changes

New CVE Received from VulnCheck 8/25/2026 8:16:34 AM

Action	Type	New Value
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.
Added	CVSS V4.0	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
Added	CVSS V3.1	AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Added	CWE	CWE-613
Added	Reference	https://github.com/lin-snow/Ech0/security/advisories/GHSA-fpw6-hrg5-q5x5
Added	Reference	https://www.vulncheck.com/advisories/ech0-before-access-token-revocation-bypass
Added	Affected	[{"vendor":"lin-snow","product":"Ech0","defaultStatus":"unaffected","packageURL":"pkg:golang/github.com/lin-snow/Ech0","versions":[{"version":"0","lessThan":"4.7.3","versionType":"semver","status":"affected"},{"version":"4.7.3","versionType":"semver","status":"unaffected"}]}]

Quick Info

CVE Dictionary Entry:
CVE-2026-79664
NVD Published Date:
08/25/2026
NVD Last Modified:
08/25/2026
Source:
VulnCheck

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Information Technology Laboratory

National Vulnerability Database