CVE-2026-44681CWE-601CWE-863

Authlib: Open Redirect in Authlib OIDC Implicit/Hybrid Authorization

Medium · published May 27, 2026

CVSS v3.1
6.1
EPSS
0%
Percentile
20.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.1 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00291 · 20.5th percentile
Weaknesses
CWE-601 · URL Redirection to Untrusted Site ('Open Redirect'); CWE-863 · Incorrect Authorization
Published
2026-05-27T19:20Z
EPSS history
Timeline
  • 27 MAY 19:20Z
    Authlib: Open Redirect in Authlib OIDC Implicit/Hybrid Authorization
    cvelistv5