Missing Authorization Affecting @better-auth/scim package, versions >=1.5.0 <1.6.11
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published8 Jul 2026
- disclosed7 Jul 2026
- creditJvr2022 Jvr
Introduced: 7 Jul 2026
NewCVE-2026-67331 (opens in a new tab)How to fix?
Upgrade @better-auth/scim to version 1.6.11 or higher.
Overview
@better-auth/scim is a SCIM plugin for Better Auth
Affected versions of this package are vulnerable to Missing Authorization in the management of non-organization SCIM providers when owner binding is not enforced. An attacker can gain unauthorized access to another user's provider, allowing them to read metadata, list connections, regenerate SCIM bearer tokens (invalidating the legitimate user's token), authenticate to SCIM API routes, manage provisioned users, and delete provider connections by sending crafted requests to the management endpoints.
Note: This is only exploitable if the plugin is configured with its default ownership settings, non-organization providers are used, and there is more than one authenticated user in the application.
Workaround
This vulnerability can be mitigated by enabling the providerOwnership option when registering the plugin and running the schema update, scoping every SCIM provider to an organization by always passing organizationId, or restricting access to the SCIM management endpoints at the edge while non-org providers remain ownerless.