What is CVE-2026-15616?

CVE-2026-15616 is a critical-severity vulnerability in Logto, classified under Use of Single-factor Authentication. CVSS score: 9.1/10. Published 2026-07-23.

How severe is CVE-2026-15616?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Vulnerability in Logto

CVE-2026-15616

Logto does not enforce locally configured MFA during SSO authentication, allowing users to bypass second-factor requirements and grants unauthorized access.

EPSS: 0.003 (25.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

Affected products

Logto — versions 1.19.0

Weakness classification (CWE)

CWE-308 — Use of Single-factor Authentication

References

cret@cert.org

Frequently asked questions

What is CVE-2026-15616?: CVE-2026-15616 is a critical-severity vulnerability in Logto, classified under Use of Single-factor Authentication. CVSS score: 9.1/10. Published 2026-07-23.
How severe is CVE-2026-15616?: Critical severity. CVSS v3 base score is 9.1 out of 10.