CVE-2026-15611 | Logto allows unverified email-based SSO account linking, ena… | CVSS 9.1 CRITICAL

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.

Metadata

CVE ID: CVE-2026-15611
State: PUBLISHED
Assigner: certcc
Reserved: 2026-07-13 16:09 UTC
Published: 2026-07-23 15:45 UTC
Last updated: 2026-07-27 16:32 UTC
Primary CWE: CWE-287
CWE-287 Improper Authentication
Vendor / Product: Logto / Logto
Sources: cve.org · NVD

Severity & Metrics

9.1 CRITICAL CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

SSVC — CISA Coordinator

Exploitation: none
Automatable: no
Tech. Impact: total

Affected products (1)

Vendor	Product	Platform	Versions
Logto	Logto	—	1.11.0 ≤ 1.37.1

Weakness (CWE)

CWE	Source	Description
—	cna	CWE-287 Improper Authentication
CWE-287	adp	CWE-287 Improper Authentication

CVSS scores (1)

Score	Severity	Version	Source	Vector
9.1	CRITICAL	3.1	adp	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

References (2)