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    CVE-2026-44681

    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.

    Published:May 27, 2026
    Last Modified:Jun 2, 2026
    EPS:May 27, 2026
    EPSS Score:0.00039
    CVSS Score:6.1

    Affected Products

    Vendor
    Authlib
    Product
    Authlib

    Exploits

    https://github.com/authlib/authlib/security/advisories/GHSA-r95x-qfjj-fjj2https://github.com/authlib/authlib/security/advisories/GHSA-r95x-qfjj-fjj2

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-178 Cross-Site Flashing

    Related CVEs

    CVE-2026-41479 (CVSS 5.4) — Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to 1.6.10 and 1.7.1, Authlib'…
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    CVE-2026-28490 (CVSS 8.3) — Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to version 1.6.9, a cryptogra…
    CVE-2026-27962 (CVSS 9.1) — Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to version 1.6.9, a JWK Heade…
    CVE-2026-28802 (CVSS 7.7) — Authlib is a Python library which builds OAuth and OpenID Connect servers. From version 1.6.5 to before versio…
    CVE-2025-68158 (CVSS 5.7) — Authlib is a Python library which builds OAuth and OpenID Connect servers. In versions 1.0.0 through 1.6.5, ca…
    CVE-2025-62706 (CVSS 6.5) — Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to version 1.6.5, Authlib’s J…
    CVE-2025-61920 (CVSS 7.5) — Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to version 1.6.5, Authlib’s J…
    CVE-2025-59420 (CVSS 7.5) — Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to version 1.6.4, Authlib’s J…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High