What is CVE-2026-41425?

CVE-2026-41425 is a medium-severity vulnerability in Authlib, classified under Cross-Site Request Forgery (CSRF). CVSS score: 5.4/10. Published 2026-04-24.

How severe is CVE-2026-41425?

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

CSRF in Authlib

CVE-2026-41425

Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to 1.6.11, there is no CSRF protection on the cache feature in authlib.integrations.starlette_client.OAuth. This vulnerability is fixed in 1.6.11.

Vulnerability class: CSRF (Cross-Site Request Forgery)

EPSS: 0.000 (4.2th percentile) — read the EPSS interpretation.

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 < 1.6.11

Weakness classification (CWE)

CWE-352 — Cross-Site Request Forgery (CSRF)

References

https://github.com/authlib/authlib/security/advisories/GHSA-jj8c-mmj3-mmgv (x_refsource_CONFIRM, Exploit, Vendor Advisory)

Frequently asked questions

What is CVE-2026-41425?: CVE-2026-41425 is a medium-severity vulnerability in Authlib, classified under Cross-Site Request Forgery (CSRF). CVSS score: 5.4/10. Published 2026-04-24.
How severe is CVE-2026-41425?: Medium severity. CVSS v3 base score is 5.4 out of 10.