CVE-2026-67327Network attack vector

Account takeover via retained pre-verification passwords

Published Aug 1, 2026 · Updated Aug 1, 2026

Improper authentication in Better Auth 1.1.3 through 1.6.21 and 1.7.0-beta.0 through 1.7.0-beta.9 allows remote attackers to take over accounts. Magic-link and email-OTP sign-in mark an existing unverified account verified without deleting its planted password or revoking its sessions. The attack requires open email/password registration plus either passwordless plugin and completes after the email owner signs in, leaving persistent read, write, and lockout access.

CVSS severity8.3
High
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authentication in Better Auth 1.1.3 through 1.6.21 and 1.7.0-beta.0 through 1.7.0-beta.9 allows remote attackers to take over accounts. Magic-link and email-OTP sign-in mark an existing unverified account verified without deleting its planted password or revoking its sessions. The attack requires open email/password registration plus either passwordless plugin and completes after the email owner signs in, leaving persistent read, write, and lockout access.

The record

CVE
CVE-2026-67327
Published
Aug 1, 2026
Updated
Aug 1, 2026
Vendor
Better Auth
Product
Better Auth
Classifications
CWE-287, CWE-345, T1078
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 1, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 1, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.1.3 <1.6.22
  2. Affected versionversion=1.7.0-beta.0 <1.7.0-beta.10

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Better Auth · Better Authversion=1.1.3 <1.6.22; version=1.7.0-beta.0 <1.7.0-beta.10

Published CVSS scores

8.7VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N
8.3Better AuthCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-287Improper Authentication
CWE-345Insufficient Verification of Data Authenticity
T1078Valid Accounts

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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