CVE-2026-67337

better-auth before 1.4.9 Two-Factor Authentication Bypass via session.cookieCache

Published Aug 1, 2026 CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Better-auth better Auth
Vendors & Products Better-auth better Auth
Type Values Removed Values Added
Description 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.
Title better-auth before 1.4.9 Two-Factor Authentication Bypass via session.cookieCache
First Time appeared Better-auth
Better-auth better-auth\/oauth-provider
Weaknesses CWE-288
CPEs cpe:2.3:a:better-auth:better-auth\/oauth-provider:*:*:*:*:*:node.js:*:*
Vendors & Products Better-auth
Better-auth better-auth\/oauth-provider
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N'}

cvssV4_0

{'score': 7.1, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Aug 3, 2026, 6:31 PM
Reserved
Jul 29, 2026, 1:07 PM
Status
Deferred
Published
Aug 1, 2026, 1:17 PM
Modified
Sep 8, 2026, 8:34 PM