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.
Published: 2026-08-01
Score: 8.7 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Fri, 14 Aug 2026 17:15:00 +0000

Type Values Removed Values Added
First Time appeared Better-auth better Auth
CPEs cpe:2.3:a:better-auth:better_auth:*:*:*:*:*:node.js:*:*
Vendors & Products Better-auth better Auth

Mon, 03 Aug 2026 18:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Sun, 02 Aug 2026 21:00:00 +0000

Type Values Removed Values Added
First Time appeared Better-auth
Better-auth scim
Vendors & Products Better-auth
Better-auth scim

Sat, 01 Aug 2026 12:45:00 +0000

Type Values Removed Values Added
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.
Title better-auth SCIM 1.5.0 before 1.7.0-beta.4 Authorization Bypass
Weaknesses CWE-639
References
Metrics cvssV3_1

{'score': 8.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L'}

cvssV4_0

{'score': 8.7, 'vector': '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'}


Subscriptions

Better-auth Better Auth Scim
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-08-14T16:50:56.013Z

Reserved: 2026-07-29T13:07:47.015Z

Link: CVE-2026-67331

cve-icon Vulnrichment

Updated: 2026-08-03T17:46:17.259Z

cve-icon NVD

Status : Received

Published: 2026-08-01T13:17:03.833

Modified: 2026-08-03T18:16:41.110

Link: CVE-2026-67331

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-02T20:31:36Z

Weaknesses
  • CWE-639

    Authorization Bypass Through User-Controlled Key