CVE-2026-63203 (GCVE-0-2026-63203)

Vulnerability from cvelistv5 – Published: 2026-09-24 15:18 – Updated: 2026-09-24 15:47
VLAI
Title
Logto: Account API can disclose stored third-party provider tokens without the identities scope
Summary
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.
Severity
7.6 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-24 15:47 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version CPE status
logto-io logto Affected: >= 1.31.0, < 1.42.0
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

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