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CVE-2026-114616

7.4 · HIGH

Authlib is a Python library which builds OAuth and OpenID Connect servers.

Published Oct 22, 2026authlibCWE-287EPSS 0.30%

Overview

CVE-2026-114616 is a high-severity vulnerability affecting authlib authlib. It was published on October 22, 2026 and has a CVSS 3.1 base score of 7.4 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.4, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to 1.9.1, Authlib's OctKey.import_key() and HMAC signing and verification path accept zero-length key material. If an application's secret lookup can return an empty string or empty bytes, a remote attacker can compute the deterministic HS256, HS384, or HS512 signature for arbitrary token claims and have Authlib treat the token as authentic. This issue is fixed in version 1.9.1.

Remediation

Check the references section for vendor advisories and patches from authlib. Update authlib to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus
authlibauthlib>= 0, < 1.9.1Affected

References

GitHubgithub.com/authlib/authlib/commit/4ff30db442c70e29486e1982cb0ad37c037f5f4bGitHubgithub.com/authlib/authlib/releases/tag/v1.9.1GitHubgithub.com/authlib/authlib/security/advisories/GHSA-8m4g-j4wp-wgcg

How CyberStrike helps

Frequently asked questions

What is CVE-2026-114616?

CVE-2026-114616 is a high-severity vulnerability affecting authlib authlib. It was published on October 22, 2026 and has a CVSS 3.1 base score of 7.4 (HIGH).

How severe is CVE-2026-114616?

This vulnerability has a CVSS 3.1 base score of 7.4, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-114616?

Check the references section for vendor advisories and patches from authlib. Update authlib to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-114616?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-114616 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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