CVE-2026-15612

CRITICAL 9.1

LOIDC nonce validation bypass

CVSS Score

9.1

EPSS Score

0.1%

EPSS Percentile

3th

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

Vendor	logto
Product	logto
Published	Jul 23, 2026
Last Updated	Jul 27, 2026

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Affected Versions

Logto / Logto

1.10.1 ≤ 1.37.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/logto-io/logto/blob/ea3ede35028dfd0bbb6d7b239623ce0e7f6cdff8/packages/core/src/sso/OidcConnector/utils.ts#L175-L182