What is CVE-2026-44681?

CVE-2026-44681 is a medium-severity vulnerability in Authlib, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 6.1/10. Published 2026-05-27.

How severe is CVE-2026-44681?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Auth bypass in Authlib

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 cau…

Vulnerability class: Open Redirect

EPSS: 0.000 (12.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Authlib — versions >= 1.7.0, < 1.7.1, < 1.6.12, 1.7.0

Weakness classification (CWE)

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Mitigation, Vendor Advisory)

Frequently asked questions

What is CVE-2026-44681?: CVE-2026-44681 is a medium-severity vulnerability in Authlib, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 6.1/10. Published 2026-05-27.
How severe is CVE-2026-44681?: Medium severity. CVSS v3 base score is 6.1 out of 10.