---
cve: "CVE-2026-67331"
severity: "HIGH"
cvss: 8.7
epss: "0.3%"
vendor: "better-auth"
kev: false
exploited: false
published: "2026-08-01 12:22:17"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-25T12:43:31+02:00"
---

# CVE-2026-67331

> 8.7 HIGH · 🧪 PoC

## Beschreibung

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-Vektor

```
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
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Gering | warn |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- a5e2442e3cc8aeac7542c9237d24b8c3ea3d6dd2 (Commit)

## Referenzen

- <https://github.com/better-auth/better-auth/security/advisories/GHSA-j8v8-g9cx-5qf4>
- <https://www.vulncheck.com/advisories/better-auth-scim-before-beta-4-authorization-bypass>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-67331) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_