What is CVE-2026-15612?

CVE-2026-15612 is a critical-severity vulnerability in Logto, classified under Insufficient Verification of Data Authenticity. CVSS score: 9.1/10. Published 2026-07-23.

How severe is CVE-2026-15612?

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

Vulnerability in Logto

CVE-2026-15612

Logto bypasses OIDC nonce validation when the nonce claim is absent from the id_token, enabling replay of authentication tokens and weakening session-binding.

EPSS: 0.002 (7.9th 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 1.10.1

Weakness classification (CWE)

CWE-345 — Insufficient Verification of Data Authenticity

References

cret@cert.org

Frequently asked questions

What is CVE-2026-15612?: CVE-2026-15612 is a critical-severity vulnerability in Logto, classified under Insufficient Verification of Data Authenticity. CVSS score: 9.1/10. Published 2026-07-23.
How severe is CVE-2026-15612?: Critical severity. CVSS v3 base score is 9.1 out of 10.