Vulnerability record · CVE-2026-15617 · published 23 July 2026

CVE-2026-15617: Logto performs principal lookup without normalizing email and identifier strings, enabling principal collision…

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

9.1 CVSS 3.1 Critical EPSS 0.43% · top 65.6% CWE-178 · CWE-178 Deferred

9.1CVSS 3.1 base score

0.43%EPSS exploitation probability, 30 days

NoNot in CISA KEV

0Affected product versions listed by NVD

1References

27 Jul 2026Last modified by NVD

Description

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

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

References

Link	Tags
https://github.com/logto-io/logto/blob/ea3ede35028dfd0bbb6d7b239623ce0e7f6cdff8/packages/core/src/libraries/verification

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2020-12812FortiOS SSL VPN two-factor authentication bypass via username case changeFortiOS SSL VPN fails to enforce the second authentication factor (FortiToken) when a user alters the letter case of their username. Because the user…KEVEPSS 49%analysed24 Jul 2020

Source: NIST National Vulnerability Database (record CVE-2026-15617), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.