CVE-2026-44681
Authlib OIDC Implicit/Hybrid Authorization Vulnerable to Open Redirect
6.1
MEDIUM
CVSS 3.1
EPSS 0.04%
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.
How to fix CVE-2026-44681
To remediate CVE-2026-44681, upgrade the affected package to a fixed version below.
- —no fix listed
- —upgrade to 1.7.1 or later
- —upgrade to 1.6.12 or later
Is CVE-2026-44681 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (3)
- from 0
- >= 1.7.0, < 1.7.1
- from 0, < 1.6.12
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |