CVE-2026-44681

EUVD-2026-32637
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.
Open Redirect
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
6.1 MEDIUM
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 10%
Affected Products (NVD)
VendorProductVersion
authlibauthlib
𝑥
< 1.6.12
authlibauthlib
1.7.0
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://github.com/authlib/authlib/security/advisories/GHSA-r95x-qfjj-fjj2
https://github.com/authlib/authlib/security/advisories/GHSA-r95x-qfjj-fjj2