{"id":"CVE-2026-55377","state":"PUBLISHED","title":"Logto: Account Center MFA management step-up bypass via WebAuthn registration verification","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.","publishedAt":"2026-07-10T19:57:58.088Z","updatedAt":"2026-07-13T16:20:47.725Z","severity":{"score":8.1,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["logto-io logto"],"affected":[{"vendor":"logto-io","product":"logto","versions":[{"version":"< 1.41.0","status":"affected"}]}],"references":["https://github.com/logto-io/logto/security/advisories/GHSA-q4h3-38gc-4p4j","https://github.com/logto-io/logto/pull/9110","https://github.com/logto-io/logto/commit/f56255a7edf3b22b0ec2fdb814814ce6b0123b74","https://github.com/logto-io/logto/releases/tag/v1.41.0"],"weaknesses":["CWE-287"],"ingestedAt":"2026-10-29T20:12:24.861Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/55xxx/CVE-2026-55377.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-55377","state":"PUBLISHED","datePublished":"2026-07-10T19:57:58.088Z","dateUpdated":"2026-07-13T16:20:47.725Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-06-16T18:57:40.181Z"},"containers":{"cna":{"title":"Logto: Account Center MFA management step-up bypass via WebAuthn registration verification","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"logto-io","product":"logto","versions":[{"version":"< 1.41.0","status":"affected"}]}],"references":[{"url":"https://github.com/logto-io/logto/security/advisories/GHSA-q4h3-38gc-4p4j","name":"https://github.com/logto-io/logto/security/advisories/GHSA-q4h3-38gc-4p4j","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/logto-io/logto/pull/9110","name":"https://github.com/logto-io/logto/pull/9110","tags":["x_refsource_MISC"]},{"url":"https://github.com/logto-io/logto/commit/f56255a7edf3b22b0ec2fdb814814ce6b0123b74","name":"https://github.com/logto-io/logto/commit/f56255a7edf3b22b0ec2fdb814814ce6b0123b74","tags":["x_refsource_MISC"]},{"url":"https://github.com/logto-io/logto/releases/tag/v1.41.0","name":"https://github.com/logto-io/logto/releases/tag/v1.41.0","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":8.1,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-287","lang":"en","description":"CWE-287: Improper Authentication","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-07-10T19:57:58.088Z"},"source":{"advisory":"GHSA-q4h3-38gc-4p4j","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/logto-io/logto/security/advisories/GHSA-q4h3-38gc-4p4j","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-13T16:20:33.380860Z","id":"CVE-2026-55377","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-07-13T16:20:47.725Z"}}]}}}