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Vulnerability record · CVE-2026-55377 · published 10 July 2026

CVE-2026-55377: Improper authentication vulnerability

Logto is the modern, open-source auth infrastructure for SaaS and AI apps. Prior to 1.41.0, Logto's Account Center step-up check accepted any active verification record that belonged to the current user and had isVerified === true. A WebAuthn registration verification record for binding a new passkey could be created and verified with only an existing Account API bearer token, then sent in the logto-verification-id header and treated as identityVerified=true by Account Center routes, allowing MFA factor management without proving possession of an existing password, identifier, or MFA factor. This issue is fixed in version 1.41.0.

8.1 CVSS 3.1 High EPSS 0.46% · top 62.3% CWE-287 · Improper authentication Deferred
8.1CVSS 3.1 base score
0.46%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
5References
13 Jul 2026Last modified by NVD

Description

Logto is the modern, open-source auth infrastructure for SaaS and AI apps. Prior to 1.41.0, Logto's Account Center step-up check accepted any active verification record that belonged to the current user and had isVerified === true. A WebAuthn registration verification record for binding a new passkey could be created and verified with only an existing Account API bearer token, then sent in the logto-verification-id header and treated as identityVerified=true by Account Center routes, allowing MFA factor management without proving possession of an existing password, identifier, or MFA factor. This issue is fixed in version 1.41.0.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

References

LinkTags
https://github.com/logto-io/logto/commit/f56255a7edf3b22b0ec2fdb814814ce6b0123b74
https://github.com/logto-io/logto/pull/9110
https://github.com/logto-io/logto/releases/tag/v1.41.0
https://github.com/logto-io/logto/security/advisories/GHSA-q4h3-38gc-4p4j
https://github.com/logto-io/logto/security/advisories/GHSA-q4h3-38gc-4p4j

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Source: NIST National Vulnerability Database (record CVE-2026-55377), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.