What is CVE-2026-41479?

CVE-2026-41479 is a medium-severity vulnerability in Authlib, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 5.4/10. Published 2026-06-22.

How severe is CVE-2026-41479?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Open Redirect in Authlib

CVE-2026-41479

Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to 1.6.10 and 1.7.1, Authlib's OAuth 2.0 authorization endpoint can be turned into an unauthenticated open redirect when a request uses an unsupported respons…

Vulnerability class: Open Redirect

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N.

Affected products

Authlib — versions < 1.6.10, = 1.7.0

Weakness classification (CWE)

CWE-601 — URL Redirection to Untrusted Site (Open Redirect)

References

security-advisories@github.com (x_refsource_CONFIRM)
security-advisories@github.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-41479?: CVE-2026-41479 is a medium-severity vulnerability in Authlib, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 5.4/10. Published 2026-06-22.
How severe is CVE-2026-41479?: Medium severity. CVSS v3 base score is 5.4 out of 10.