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CVE-2026-44681— Authlib: Open Redirect in Authlib OIDC Implicit/Hybrid Authorization

Quick assessment

Affected
authlib authlib
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Authlib是Authlib开源的一个构建 OAuth 和 OpenID Connect 服务器的终极 Python 库。 Authlib 1.6.12之前版本和1.7.1之前版本存在安全漏洞，该漏洞源于OpenIDImplicitGrant和OpenIDHybridGrant授权端点中的未认证开放重定向，允许远程攻击者通过提交省略openid作用域的授权请求，使授权服务器向攻击者选择的URL发出HTTP 302重定向。

CVSS 6.1 · Medium EPSS 0.29% · P20

Affected Version Matrix 2

VendorProduct Version RangeStatus
authlib authlib < 1.6.12 affected
>= 1.7.0, < 1.7.1 affected
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I. Basic Information for CVE-2026-44681

Vulnerability Information
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Vulnerability Title
Authlib: Open Redirect in Authlib OIDC Implicit/Hybrid Authorization
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
指向未可信站点的URL重定向(开放重定向)
Source: CVE Program / CVE List V5
Vulnerability Title
Authlib 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Authlib是Authlib开源的一个构建 OAuth 和 OpenID Connect 服务器的终极 Python 库。 Authlib 1.6.12之前版本和1.7.1之前版本存在安全漏洞，该漏洞源于OpenIDImplicitGrant和OpenIDHybridGrant授权端点中的未认证开放重定向，允许远程攻击者通过提交省略openid作用域的授权请求，使授权服务器向攻击者选择的URL发出HTTP 302重定向。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
authlib authlib < 1.6.12 -

II. Public POCs for CVE-2026-44681

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III. Intelligence Information for CVE-2026-44681

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Vendor Advisories for CVE-2026-44681 (1)

IV. Related Vulnerabilities

Same product: authlib
Same vendor: authlib
Same weakness: CWE-601

V. Comments for CVE-2026-44681

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