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.
Advisories

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Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Mon, 03 Aug 2026 19:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

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


Sat, 01 Aug 2026 14:45:00 +0000

Type Values Removed Values Added
First Time appeared Better-auth better Auth
Vendors & Products Better-auth better Auth

Sat, 01 Aug 2026 12:45:00 +0000

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'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-08-03T18:31:13.051Z

Reserved: 2026-07-29T13:07:47.016Z

Link: CVE-2026-67337

cve-icon Vulnrichment

Updated: 2026-08-03T18:31:08.688Z

cve-icon NVD

Status : Received

Published: 2026-08-01T13:17:04.693

Modified: 2026-08-03T19:16:52.353

Link: CVE-2026-67337

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-02T03:15:03Z

Weaknesses