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.
Published: 2026-05-27
Score: 6.1 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-r95x-qfjj-fjj2 Authlib OIDC Implicit/Hybrid Authorization Vulnerable to Open Redirect
History

Tue, 02 Jun 2026 17:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 02 Jun 2026 15:00:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:authlib:authlib:*:*:*:*:*:*:*:*
cpe:2.3:a:authlib:authlib:1.7.0:*:*:*:*:*:*:*

Thu, 28 May 2026 03:15:00 +0000

Type Values Removed Values Added
First Time appeared Authlib
Authlib authlib
Vendors & Products Authlib
Authlib authlib

Wed, 27 May 2026 19:30:00 +0000

Type Values Removed Values Added
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.
Title Authlib: Open Redirect in Authlib OIDC Implicit/Hybrid Authorization
Weaknesses CWE-601
CWE-863
References
Metrics cvssV3_1

{'score': 6.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-06-02T16:56:48.017Z

Reserved: 2026-05-07T16:20:08.660Z

Link: CVE-2026-44681

cve-icon Vulnrichment

Updated: 2026-06-02T16:56:44.655Z

cve-icon NVD

Status : Modified

Published: 2026-05-27T20:16:37.463

Modified: 2026-06-17T10:51:14.020

Link: CVE-2026-44681

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-28T03:00:05Z

Weaknesses