CVE-2026-15615highCWE-345

CVE-2026-15615: high-severity vulnerability in Logto

SAML <Conditions> element not validated

Published · Updated

Follow this CVE+ Monitor Logto

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

21Vexday Risk Score

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

ssvc Trackcvss 7.5epss 0.2%
Logto omits validation of the SAML <Conditions> element, enabling attackers to strip time and audience restrictions and replay assertions indefinitely.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/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-2026-15617CRITICALPrincipal/domain lookup without case normalizationEPSS 0.4%CVE-2026-15614HIGHIdP-initiated SAML sessions not reliably invalidated (replay)EPSS 0.3%CVE-2026-15612CRITICALLOIDC nonce validation bypassEPSS 0.2%