CVE-2026-44681
MEDIUMCVSS v3.1: 6.1 · EPSS: 0.0004 (12.1 percentile)
Source data as of:
At a glance
- Severity
- MEDIUM
- CVSS
- 6.1 v3.1 · NVD
- EPSS
- 0.0004 (12.1 percentile) · FIRST.org
- CISA KEV
- No
- Type
- Incorrect Authorization · NVD CWE
- Attack conditions (CVSS vector)
- NetworkNo privileges · Source: NVD Vector
- Affected vendors
- authlib
- Published
- 2026-05-27 · Modified: 2026-06-02
- References
- Jump to references (1)
CVSS / EPSS / KEV
Source — CVSS: NVD · EPSS: FIRST.org · KEV: CISA. Data & Sources
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
Reference URLs as listed by NVD, grouped by a mechanical match on the link's host/pattern. Labels describe the link type only.