CVE-2026-44681

MEDIUM

Authlib: Open Redirect in Authlib OIDC Implicit/Hybrid Authorization

Title source: cna
STIX 2.1

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.

References (1)

Core 1
Core References

Scores

CVSS v3 6.1
EPSS 0.0018
EPSS Percentile 7.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-601 CWE-863
Status published
Products (5)
authlib/authlib 1.7.0
authlib/authlib < 1.6.12 (2 CPE variants)
authlib/authlib >= 1.7.0, < 1.7.1
pypi/authlib 0 - 1.6.12PyPI
pypi/authlib 1.7.0 - 1.7.1PyPI
Published May 27, 2026
Tracked Since May 28, 2026