CVE-2026-114619
Medium · CVSS 4.6Published 2026-10-22
CVSS
4.6
Medium
EPSS
—
exploit probability
Active Exploit
No
not yet listed
What is CVE-2026-114619?
Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to 1.9.0, OpenIDImplicitGrant.validate_authorization_request() checks the client-controlled raw request.payload.scope for openid after the parent grant has filtered allowed scopes into request.scope. A registered client permitted an ID token response type but not the openid scope can add openid to the request, obtain user consent, and receive a signed ID token containing the user's subject and allowed profile claims. Authorization code flow and deployments that allow openid for every client permitted an ID token response are not affected. In authlib/oidc/core/grants/implicit.py, OpenIDImplicitGrant.validate_authorization_request() checks request.payload.scope instead of the filtered request.scope. This issue is fixed in version 1.9.0.
CVSS Score Explained
CVSS 4.6 is Medium severity. Exploitation usually requires some specific conditions (local access, user interaction, or a particular config). Still worth patching in your next maintenance window.
EPSS Exploitation Probability
No EPSS score yet — model needs more data on this CVE.
References & Patches
- ›https://github.com/authlib/authlib/commit/e3bd41cb29dcfee434453b135ffb487884baeedf
- ›https://github.com/authlib/authlib/pull/945
- PATCHhttps://github.com/authlib/authlib/releases/tag/v1.9.0
- ›https://github.com/authlib/authlib/security/advisories/GHSA-q686-2qmg-hqc7
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