CVE-2026-63203

{"id": "CVE-2026-63203", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-63203", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-09-24T15:47:15.549514Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 7.6, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 4.7, "exploitabilityScore": 2.3}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "logto-io", "product": "logto", "versions": [{"status": "affected", "version": ">= 1.31.0, < 1.42.0"}]}]}], "published": "2026-09-24T16:17:08.700", "references": [{"url": "https://github.com/logto-io/logto/commit/b560d17a4da4c25da95e3c73af4485d18ab7c224", "source": "security-advisories@github.com"}, {"url": "https://github.com/logto-io/logto/pull/9116", "source": "security-advisories@github.com"}, {"url": "https://github.com/logto-io/logto/releases/tag/v1.42.0", "source": "security-advisories@github.com"}, {"url": "https://github.com/logto-io/logto/security/advisories/GHSA-6g9q-qrx7-3jxf", "source": "security-advisories@github.com"}, {"url": "https://github.com/logto-io/logto/security/advisories/GHSA-6g9q-qrx7-3jxf", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Primary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-862"}]}], "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."}], "lastModified": "2026-09-24T16:17:08.837", "sourceIdentifier": "security-advisories@github.com"}