CVE-2026-67327 json
better-auth before 1.6.22 Account Takeover via Magic-Link Email-OTP
published 2026-07-24 3 mo ago modified 2026-09-08 2 mo ago also GHSA-qq9h-g4jm-xgf3 , EUVD-2026-51841
- cvss
- 8.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 37%
- public exploits
- 0
- none known
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.
Patch / fix
- npm better-auth 1.6.22, 1.7.0-beta.10
- better-auth better-auth 1.6.22, 1.7.0-beta.10
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 3 mo ago
Exploit prediction
0.43% chance of exploitation in the next 30 days, higher than 37% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 8.7 | 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 |
| CNA | 3.1 | 8.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L |
| CNA | 4.0 | 8.7 | 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 |
| GitHub | 3.1 | 8.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | better-auth | >=1.1.3, <1.6.22 >=1.7.0-beta.0, <1.7.0-beta.10 |
1.6.22 1.7.0-beta.10 |
Affected products
- better-auth better-auth
Classification
References
-
github.com
/better-auth/better-auth/pull/10239
web
-
github.com
/better-auth/better-auth/commit/c06a56d83a40bbaeac12d3a8b8b67e59f92a9110
web
-
github.com
/better-auth/better-auth/security/advisories/GHSA-qq9h-g4jm-xgf3
vendor-advisory, web
-
vulncheck.com
/advisories/better-auth-before-account-takeover-via-magic-link-email-otp
third-party-advisory
-
github.com
/better-auth/better-auth
package
-
github.com
/better-auth/better-auth/releases/tag/v1.6.22
web
-
github.com
/better-auth/better-auth/releases/tag/v1.7.0-beta.10
web
Sources
- CVE List CVE-2026-67327
- GitHub Advisory GHSA-qq9h-g4jm-xgf3
- NVD CVE-2026-67327
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