CVE-2026-67327
Last modified
CVE-2026-67327 is a high-severity vulnerability rated 8.7/10 on the CVSS scale. 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. EPSS estimates a 0.23% chance of exploitation in the next 30 days.
Description
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Weakness Enumeration
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| better-auth | better-auth | >= 1.1.3, < 1.6.22 |
| better-auth | better-auth | >= 1.7.0-beta.0, < 1.7.0-beta.10 |
References
Timeline
- Published
- Last Modified
- Status
- Received
Frequently Asked Questions
What is CVE-2026-67327?
How severe is CVE-2026-67327?
How do I fix CVE-2026-67327?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-67321axios versions 0.31.1 before 0.33.0 and 1.15.1 before 1.18.0…6.9
- CVE-2026-67322GitPython before 3.1.52 is vulnerable to environment-variabl…8.7
- CVE-2026-67323GitPython before 3.1.51 fails to guard against dangerous Git…8.6
- CVE-2026-67324GitPython 3.1.50 fails to recognize joined short-option form…9.8
- CVE-2026-67325GitPython before 3.1.51 contains an incomplete command injec…8.8
- CVE-2026-67326GitPython before 3.1.50 fails to validate newline characters…7.3
- CVE-2026-67328@better-auth/sso versions before 1.6.21 contain multiple aut…8.6
- CVE-2026-67329@better-auth/stripe versions >= 1.4.11 and < 1.6.21, and >= …7.1
- CVE-2026-6733Impact: Undici's HTTP/1.1 client is vulnerable to response q…3.7
- CVE-2026-67330@better-auth/scim (a better-auth plugin) versions >= 1.4.0-b…9.9
- CVE-2026-67331better-auth SCIM versions from 1.5.0 before 1.7.0-beta.4 fai…8.7
- CVE-2026-67332@better-auth/oauth-provider before 1.7.0-beta.4 fails to bin…6.4
Are you affected by CVE-2026-67327?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST