CVE-2026-44681
Authlib: Open Redirect in Authlib OIDC Implicit/Hybrid Authorization
CVSS Score
6.1
EPSS Score
0.0%
EPSS Percentile
12th
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.
| CWE | CWE-601 CWE-863 |
| Vendor | authlib |
| Product | authlib |
| Published | May 27, 2026 |
| Last Updated | Jun 2, 2026 |
Stay Ahead of the Next One
Get instant alerts for authlib authlib
Be the first to know when new medium vulnerabilities affecting authlib authlib are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None
Affected Versions
authlib / authlib
< 1.6.12 >= 1.7.0, < 1.7.1