CVE-2026-67331CWE-639

CVE-2026-67331

High · published August 1, 2026

CVSS v3.1

8.3

EPSS

Percentile

31.5

In the wild

Unconfirmed

What it is

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.

The record

Technical detail

CVSS v3.1: 8.3 · HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L
CVSS v4.0: Not supplied
EPSS: 0.00388 · 31.5th percentile
Weakness: CWE-639 · Authorization Bypass Through User-Controlled Key
Published: 2026-08-01T17:17Z

References (3)

https://github.com/better-auth/better-auth/security/advisories/GHSA-j8v8-g9cx-5qf4 · [email protected]https://www.vulncheck.com/advisories/better-auth-scim-before-beta-4-authorization-bypass · [email protected]https://github.com/better-auth/better-auth/security/advisories/GHSA-j8v8-g9cx-5qf4 · 134c704f-9b21-4f2e-91b3-4a467353bcc0

EPSS history

Timeline

01 AUG 12:22Z
better-auth SCIM 1.5.0 before 1.7.0-beta.4 Authorization Bypass
cvelistv5