High severity · published Aug 1, 2026
CVE-2026-67331
better-auth SCIM 1.5.0 before 1.7.0-beta.4 Authorization Bypass
8.3
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 33% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SC
scim · better-auth
1.5.0 before 1.7.0-beta.4 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-67331
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-67331
vendor-advisory
https://github.com/better-auth/better-auth/security/advisories/GHSA-j8v8-g9cx-5qf4
third-party-advisory
https://www.vulncheck.com/advisories/better-auth-scim-before-beta-4-authorization-bypass
More from scim
9.9
CVE-2026-67330
better-auth SCIM 1.4.0-beta.27 through 1.6.21 Account Takeover via Provider-ID Collision