CVE-2026-44681 MEDIUM

CVE-2026-44681: Authlib: Open Redirect in Authlib OIDC Implicit/Hybrid Authorization

Vendor Authlib
Product authlib
Weakness CWE-601 · Open redirect
Published May 27, 2026
Last update June 2, 2026
View on NVD All CVEs

CVSS base score

6.1/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Confidentiality Low
Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

What the vulnerability does

01Description

Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to 1.6.12 and 1.7.1, an unauthenticated open redirect in Authlib's OpenIDImplicitGrant and OpenIDHybridGrant authorization endpoint lets a remote attacker cause the authorization server to issue an HTTP 302 to an attacker-chosen URL by submitting an authorization request that omits the openid scope. This vulnerability is fixed in 1.6.12 and 1.7.1.

Key dates

02Disclosure timeline

May 27, 2026 CVE published
June 2, 2026 Record updated