CVE-2026-44681
MEDIUM6.1EPSS 0.04%Authlib OIDC Implicit/Hybrid Authorization Vulnerable to Open Redirect
Published: 5/13/2026Modified: 5/29/2026
Description
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.
Affected packages (2)
- Debian/python-authlibfrom 0
- PyPI/authlib>= 1.7.0, < 1.7.1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |