by Kastro
Paper/Archive/CVE-2026-15612

CVE-2026-15612

Logto Logto — LOIDC nonce validation bypass

EPSS 0.2%CVSS 9.1
critical.is priorityof 100
30
CVSS 9.1 (ADP)9.1 / 10 × 3027.3Not in CISA KEV+300.0EPSS percentile 15.5.155 × 203.1No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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

Affected

ProductAffectedFixed inSource
Logto1.10.1 – 1.37.1–CNA

Scores by source

CISA ADP9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

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