CVE-2026-114614: Authlib is a Python library which builds OAuth and OpenID Connect servers. From 0.13 until 1.8.0…

CVE-2026-114614 · Severity: low · CVSS 3.1 · Published 2026-10-22

Authlib is a Python library which builds OAuth and OpenID Connect servers. From 0.13 until 1.8.0, authlib.common.security.is_secure_transport() uses a textual prefix comparison for loopback HTTP exemptions, so a URL whose userinfo begins with a loopback host can be accepted even when its parsed host is an external non-loopback system. An external party able to supply a URL to OIDC RP-Initiated Logout registration, authorization-server metadata validation, or another call site can bypass the TLS-required guard and cause cleartext redirection or acceptance of cleartext endpoints. The issue does not bypass redirect URI exact matching and does not by itself forge tokens or authenticate users. The vulnerable authlib.common.security.is_secure_transport() implementation in authlib/common/security.py misinterprets the userinfo component before OIDC RP-Initiated Logout dynamic client registration and other consumers enforce transport security. This issue is fixed in version 1.8.0.

Technologies: authlib (PyPI). Vendors: PyPI.

Quick answers

Is CVE-2026-114614 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-114614 being exploited in the wild.
How severe is CVE-2026-114614?
Low severity, with a CVSS score of 3.1, published 22 October 2026.
Which products and versions are affected?
authlib (PyPI) <= 1.7.2, ECOSYSTEM:introduced=0,fixed=1.8.0, ECOSYSTEM:introduced=0.13,fixed=1.8.0.
Is there a fix for CVE-2026-114614?
Yes. authlib (PyPI): upgrade to 1.8.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2026-114614?
Check whether you run authlib (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • authlib (PyPI): upgrade to 1.8.0 or later
    pip install "authlib>=1.8.0"

Affected products

  • authlib (PyPI) <= 1.7.2, ECOSYSTEM:introduced=0,fixed=1.8.0, ECOSYSTEM:introduced=0.13,fixed=1.8.0

Identifiers

  • CVE-2026-114614
  • GHSA-jj7h-c3hg-m23x
  • PYSEC-2026-4354

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