Vulnerability DatabaseCVE-2026-67337
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CVE-2026-67337
Published:August 01, 2026
Updated:August 04, 2026
better-auth versions before 1.4.9 contain a two-factor authentication bypass vulnerability when session.cookieCache is enabled. Attackers with valid primary credentials can access authenticated routes without completing second-factor verification by exploiting premature session caching.
Affected Packages
https://github.com/better-auth/better-auth.git (GITHUB):
Affected version(s) >=v0.0.2-beta.1 <v1.4.9
Fix Suggestion:
Update to version v1.4.9
better-auth (NPM):
Affected version(s) >=0.0.1 <1.4.9
Fix Suggestion:
Update to version 1.4.9
Related Resources (5)
https://github.com/better-auth/better-auth
https://github.com/better-auth/better-auth/security/advisories/GHSA-xg6x-h9c9-2m83
https://www.vulncheck.com/advisories/better-auth-before-two-factor-authentication-bypass-via-session-cookiecache
https://nvd.nist.gov/vuln/detail/CVE-2026-67337
https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/67xxx/CVE-2026-67337.json
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CVSS v4
Base Score:
7.1
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
NONE
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
6.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Weakness Type (CWE)
Authentication Bypass Using an Alternate Path or Channel
CWE-288
EPSS
Base Score:
0.27