CVE-2026-15611

Unverified email-based SSO account linking

Published Jul 23, 2026 CVSS 3.1 · 9.1 Critical EPSS < 1% KEV · Not listed
Description
Logto allows unverified email-based SSO account linking, enabling an attacker to register an identity at a permissive IdP using a victim’s email and gain unauthorized access to the victim’s account.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Weaknesses CWE-285
Type Values Removed Values Added
First Time appeared Logto-io
Logto-io logto
Vendors & Products Logto-io
Logto-io logto
Type Values Removed Values Added
Weaknesses CWE-287
Metrics cvssV3_1

{'score': 9.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Weaknesses CWE-285
Type Values Removed Values Added
Description Logto allows unverified email-based SSO account linking, enabling an attacker to register an identity at a permissive IdP using a victim’s email and gain unauthorized access to the victim’s account.
Title Unverified email-based SSO account linking
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
certcc
Published
Updated
Jul 27, 2026, 4:32 PM
Reserved
Jul 13, 2026, 4:09 PM
Status
Deferred
Published
Jul 23, 2026, 4:17 PM
Modified
Jul 27, 2026, 5:16 PM