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    CVE-2026-67337

    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.

    Published:Aug 1, 2026
    Last Modified:Aug 3, 2026
    EPS:Aug 1, 2026
    EPSS Score:0.00269
    CVSS Score:6.5

    Affected Products

    Vendor
    Better-auth
    Product
    Better-auth\/oauth-provider
    Vendor
    Better-auth
    Product
    Better Auth

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-127 Directory Indexing
    CAPEC-665 Exploitation of Thunderbolt Protection Flaws

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High