TI-2026-47623 Aliases CVE-2026-67327 GHSA-9wm3-rh5c-fc37

better-auth before 1.6.22 Account Takeover via Magic-Link Email-OTP

MEDIUM 40CWE-287Published 2026-08-01 · Updated 2026-08-03

Key facts

Attack vector: Network
Privileges required: None
User interaction: Passive
Attack complexity: Low
Attack requirements: None
Impact type: Security bypass
Confidentiality · integrity · availability: High · High · Low
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-287.

Summary

better-auth versions >= 1.1.3 and < 1.6.22 (and pre-release versions >= 1.7.0-beta.0 and < 1.7.0-beta.10) are vulnerable to account takeover via pre-account hijacking on magic-link and email-OTP sign-in when open email/password registration is enabled. An attacker registers an account with the victim's email address and an attacker-chosen password; the account remains unverified. When the legitimate owner later signs in via the magic-link or email-OTP passwordless flow, the account is marked verified without removing the pre-existing password or revoking existing sessions, so the attacker's password remains valid, granting persistent access to the victim's account. Fixed in 1.6.22 and 1.7.0-beta.10.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00429 37th percentileScored 2026-11-07

Fix Fixed better-auth (better-auth): 1.6.22, 1.7.0-beta.10

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
better-auth	better-auth	1.1.3 to before 1.6.22	1.6.22	Patch available	CNA
better-auth	better-auth	1.7.0-beta.0 to before 1.7.0-beta.10	1.7.0-beta.10	Patch available	CNA

better-auth Vendorbetter-auth Affected 1.1.3 to before 1.6.22 Fixed in 1.6.22 Patch available CNA
better-auth Vendorbetter-auth Affected 1.7.0-beta.0 to before 1.7.0-beta.10 Fixed in 1.7.0-beta.10 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:a:better-auth:better_auth::::::::	—	—	better-auth

cpe:2.3:a:better-auth:better_auth:*:*:*:*:*:*:*:* Versions — — ·better-auth

Remediation

Fix · CNA better-auth (better-auth) Fixed in 1.6.22
Fix · CNA better-auth (better-auth) Fixed in 1.7.0-beta.10

Timeline

2026-10-02 Threatist record created from CVE-2026-67327
2026-10-03 Alias added: GHSA-9wm3-rh5c-fc37

References

Advisory 1

GitHub Security Advisory (GHSA-qq9h-g4jm-xgf3)

TI-2025-38277 Better Auth: Unauthenticated API key creation through api-key plugin CVSS 4.0CRITICAL 9.3
TI-2026-47627 better-auth SCIM 1.5.0 before 1.7.0-beta.4 Authorization Bypass CVSS 4.0HIGH 8.7
TI-2025-20000 Beter Auth has an Open Redirect via Scheme-Less Callback Parameter CVSS 4.0MEDIUM 6.9
TI-2026-13066 better-auth better-icons scan_project_icons/sync_icon path traversal CVSS 4.0MEDIUM 4.8
TI-2026-79320 OAuth state accepted as Magic Link token in Better Auth CVSS 3.1CRITICAL 9.1
TI-2026-74552 Authentication bypass in Better Auth Magic Link verification CVSS 4.0CRITICAL 9.3

See all 39 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences