CVE-2026-41479

Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to 1.6.10 and 1.7.1, Authlib's OAuth 2.0 authorization endpoint can be turned into an unauthenticated open redirect when a request uses an unsupported response_type and supplies an attacker-controlled redirect_uri. The vulnerable behavior happens before client lookup and before any redirect URI validation. As a result, an attacker does not need a valid client registration, an authenticated user, or any prior state. A single request to the authorization endpoint is enough to obtain a 302 Location response to an arbitrary attacker-controlled URL. This vulnerability is fixed in 1.6.10 and 1.7.1.

CVSS v3 5.4 MEDIUM

5.4^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 2.5

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/authlib/authlib/commit/3be08468201a7766a93012ce149ea12822cab096	Patch
https://github.com/authlib/authlib/security/advisories/GHSA-w8p2-r796-3vmq	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:authlib:authlib::::::::
	cpe:2.3:a:authlib:authlib:1.7.0:::::::*

History

26 Jun 2026, 20:10

Type	Values Removed	Values Added
References	~~() https://github.com/authlib/authlib/commit/3be08468201a7766a93012ce149ea12822cab096 -~~	() https://github.com/authlib/authlib/commit/3be08468201a7766a93012ce149ea12822cab096 - Patch
References	~~() https://github.com/authlib/authlib/security/advisories/GHSA-w8p2-r796-3vmq -~~	() https://github.com/authlib/authlib/security/advisories/GHSA-w8p2-r796-3vmq - Exploit, Vendor Advisory
CPE		cpe:2.3:a:authlib:authlib:::::::: cpe:2.3:a:authlib:authlib:1.7.0:::::::*
First Time		Authlib Authlib authlib

22 Jun 2026, 21:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-06-22 21:16

Updated : 2026-06-26 20:10

NVD link : CVE-2026-41479

Mitre link : CVE-2026-41479

CVE.ORG link : CVE-2026-41479

JSON object : View

Products Affected

authlib

authlib

CWE

CWE-601

URL Redirection to Untrusted Site ('Open Redirect')

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