@better-auth/sso versions before 1.6.21 contain multiple authentication bypass vulnerabilities in SSO provider handling that allow attackers to sign in as arbitrary users. Attackers can exploit domain verification parsing mismatches, orphaned provider accounts, unbound SAML assertions, or reflected XSS on logout endpoints to gain unauthorized session access and account takeover.
Metrics
Affected Vendors & Products
References
History
Fri, 14 Aug 2026 17:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Better-auth better-auth\/sso
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| CPEs | cpe:2.3:a:better-auth:better-auth\/sso:*:*:*:*:*:node.js:*:* | |
| Vendors & Products |
Better-auth better-auth\/sso
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Mon, 03 Aug 2026 21:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
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Sun, 02 Aug 2026 21:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Better-auth
Better-auth sso |
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| Vendors & Products |
Better-auth
Better-auth sso |
Sat, 01 Aug 2026 12:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | @better-auth/sso versions before 1.6.21 contain multiple authentication bypass vulnerabilities in SSO provider handling that allow attackers to sign in as arbitrary users. Attackers can exploit domain verification parsing mismatches, orphaned provider accounts, unbound SAML assertions, or reflected XSS on logout endpoints to gain unauthorized session access and account takeover. | |
| Title | @better-auth/sso before 1.6.21 Account Takeover via SSO | |
| Weaknesses | CWE-79 | |
| References |
| |
| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: VulnCheck
Published: 2026-08-01T12:22:17.940Z
Updated: 2026-08-14T16:50:54.741Z
Reserved: 2026-07-29T13:07:47.015Z
Link: CVE-2026-67328
Updated: 2026-08-03T19:39:16.672Z
Status : Deferred
Published: 2026-08-01T13:17:03.380
Modified: 2026-09-08T20:34:34.997
Link: CVE-2026-67328
No data.