{"id":"CVE-2026-63203","state":"PUBLISHED","title":"Logto: Account API can disclose stored third-party provider tokens without the identities scope","description":"Logto is the modern, open-source auth infrastructure for SaaS and AI apps. From 1.31.0 until 1.42.0, the Account API handlers in packages/core/src/routes/account/third-party-tokens.ts allow a caller holding a same-user access token with only the openid scope to retrieve stored social or enterprise SSO provider access tokens through GET /api/my-account/identities/{target}/access-token or GET /api/my-account/sso-identities/{connectorId}/access-token. The handlers authenticate the user but do not require the identities scope that protects neighboring identity-detail operations, bypassing the intended Account API consent boundary. Exploitation requires federated token-set storage to be enabled and the affected user to have authenticated through a supported connector. A low-trust application can use the disclosed provider token against upstream APIs within that token's granted scopes. This issue is fixed in version 1.42.0.","publishedAt":"2026-09-24T15:18:32.273Z","updatedAt":"2026-09-24T15:47:41.056Z","severity":{"score":7.6,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["logto-io logto"],"affected":[{"vendor":"logto-io","product":"logto","versions":[{"version":">= 1.31.0, < 1.42.0","status":"affected"}]}],"references":["https://github.com/logto-io/logto/security/advisories/GHSA-6g9q-qrx7-3jxf","https://github.com/logto-io/logto/pull/9116","https://github.com/logto-io/logto/commit/b560d17a4da4c25da95e3c73af4485d18ab7c224","https://github.com/logto-io/logto/releases/tag/v1.42.0"],"weaknesses":["CWE-862"],"ingestedAt":"2026-10-29T20:12:41.951Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/63xxx/CVE-2026-63203.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-63203","state":"PUBLISHED","datePublished":"2026-09-24T15:18:32.273Z","dateUpdated":"2026-09-24T15:47:41.056Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-07-15T22:19:06.905Z"},"containers":{"cna":{"title":"Logto: Account API can disclose stored third-party provider tokens without the identities scope","descriptions":[{"lang":"en","value":"Logto is the modern, open-source auth infrastructure for SaaS and AI apps. From 1.31.0 until 1.42.0, the Account API handlers in packages/core/src/routes/account/third-party-tokens.ts allow a caller holding a same-user access token with only the openid scope to retrieve stored social or enterprise SSO provider access tokens through GET /api/my-account/identities/{target}/access-token or GET /api/my-account/sso-identities/{connectorId}/access-token. The handlers authenticate the user but do not require the identities scope that protects neighboring identity-detail operations, bypassing the intended Account API consent boundary. Exploitation requires federated token-set storage to be enabled and the affected user to have authenticated through a supported connector. A low-trust application can use the disclosed provider token against upstream APIs within that token's granted scopes. This issue is fixed in version 1.42.0."}],"affected":[{"vendor":"logto-io","product":"logto","versions":[{"version":">= 1.31.0, < 1.42.0","status":"affected"}]}],"references":[{"url":"https://github.com/logto-io/logto/security/advisories/GHSA-6g9q-qrx7-3jxf","name":"https://github.com/logto-io/logto/security/advisories/GHSA-6g9q-qrx7-3jxf","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/logto-io/logto/pull/9116","name":"https://github.com/logto-io/logto/pull/9116","tags":["x_refsource_MISC"]},{"url":"https://github.com/logto-io/logto/commit/b560d17a4da4c25da95e3c73af4485d18ab7c224","name":"https://github.com/logto-io/logto/commit/b560d17a4da4c25da95e3c73af4485d18ab7c224","tags":["x_refsource_MISC"]},{"url":"https://github.com/logto-io/logto/releases/tag/v1.42.0","name":"https://github.com/logto-io/logto/releases/tag/v1.42.0","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.6,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-862","lang":"en","description":"CWE-862: Missing Authorization","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-09-24T15:18:32.273Z"},"source":{"advisory":"GHSA-6g9q-qrx7-3jxf","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/logto-io/logto/security/advisories/GHSA-6g9q-qrx7-3jxf","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-24T15:47:15.549514Z","id":"CVE-2026-63203","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":"2026-09-24T15:47:41.056Z"}}]}}}