CVE-2026-15617criticalCWE-178

CVE-2026-15617: critical vulnerability in Logto

Principal/domain lookup without case normalization

Published · Updated

Follow this CVE+ Monitor Logto

E-mail alert when it lands in KEV, gets a public PoC or its score goes up.

28Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 9.1epss 0.4%
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
Affected products
Logto · Logto
Related CVEs — Logto

In the same product, most dangerous first.

CVE-2026-15616CRITICALLocal MFA not enforced during SSO sign-inEPSS 0.5%CVE-2026-15611CRITICALUnverified email-based SSO account linkingEPSS 0.5%CVE-2026-15614HIGHIdP-initiated SAML sessions not reliably invalidated (replay)EPSS 0.3%CVE-2026-15612CRITICALLOIDC nonce validation bypassEPSS 0.2%CVE-2026-15615HIGHSAML <Conditions> element not validatedEPSS 0.2%