CVE-2026-44681
Published:May 27, 2026
Updated:June 11, 2026
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
authlib (CONDA):
Affected version(s) >=0.10 <1.6.12Fix Suggestion:
Update to version 1.6.12https://github.com/authlib/authlib.git (GITHUB):
Affected version(s) =v1.7.0 <v1.7.1Fix Suggestion:
Update to version v1.7.1https://github.com/authlib/authlib.git (GITHUB):
Affected version(s) >=v0.1 <v1.6.12Fix Suggestion:
Update to version v1.6.12authlib (PYTHON):
Affected version(s) >=0.1rc0 <1.6.12Fix Suggestion:
Update to version 1.6.12authlib (PYTHON):
Affected version(s) =1.7.0 <1.7.1Fix Suggestion:
Update to version 1.7.1authlib (PYTHON):
Affected version(s) >=0.1rc0 <1.6.12Fix Suggestion:
Update to version 1.6.12Related Resources (6)
Do you need more information?
Contact UsCVSS v4
Base Score:
5.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
PASSIVE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
LOW
Vulnerable System Availability
NONE
Subsequent System Confidentiality
LOW
Subsequent System Integrity
LOW
Subsequent System Availability
NONE
CVSS v3
Base Score:
6.1
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Weakness Type (CWE)
EPSS
Base Score:
0.04