CVE-2026-15617

CriticalCVSS 9.1/10Last modified Jul 27, 2026

Description

Logto performs principal lookup without normalizing email and identifier strings, enabling principal collision and unauthorized account access via case- or Unicode-different identities.

Metrics

CVSS 3.1 9.1/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Weakness enumeration

CWE-178

Affected software

Vendor	Product	Versions
Logto	Logto	>= 1.10.1, <= 1.37.1

References

https://github.com/logto-io/logto/blob/ea3ede35028dfd0bbb6d7b239623ce0e7f6cdff8/packages/core/src/libraries/verification-helpers/single-sign-on-guard.ts#L23-L33

Timeline

Published: Jul 23, 2026
Last modified: Jul 27, 2026
NVD status: Deferred

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