CVE-2026-67331
better-auth SCIM 1.5.0 before 1.7.0-beta.4 Authorization Bypass
- State
- Published
- Severity
- 8.7 High
- Published
- Aug 1, 2026
- Updated
- Oct 8, 2026
- Reserved
- Jul 29, 2026
Description
better-auth SCIM versions from 1.5.0 before 1.7.0-beta.4 fail to bind non-organization SCIM providers to their creator by default, allowing authenticated users to manage other users' providers. Attackers can regenerate SCIM bearer tokens, invalidate legitimate tokens, and authenticate to SCIM API routes with the attacker-controlled token.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.7 High | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 8.3 High | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L | VulnCheck |
Weaknesses
- CWE-639 Authorization Bypass Through User-Controlled Key
Affected Products
| Product | Versions |
|---|---|
scimbetter-auth |
|
References
- GitHub Security Advisory (GHSA-j8v8-g9cx-5qf4)vendor-advisory
- VulnCheck Advisory: better-auth SCIM 1.5.0 before 1.7.0-beta.4 Authorization Bypassthird-party-advisory
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