What is CVE-2026-66674?

CVE-2026-66674 is a medium-severity vulnerability in Elliot Sowers/ Relywp Simple Cloudflare Turnstile, classified under Authentication Bypass by Spoofing. CVSS score: 5.6/10. Published 2026-09-10.

How severe is CVE-2026-66674?

Medium severity. CVSS v3 base score is 5.6 out of 10.

Vulnerability in Elliot Sowers/ Relywp Simple Cloudflare Turnstile

CVE-2026-66674

Unauthenticated Bypass Vulnerability in Simple Cloudflare Turnstile <= 1.42.1 versions.

CVSS v3 metric

CVSS v3 base score 5.6 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L.

Affected products

Elliot Sowers/ Relywp Simple Cloudflare Turnstile

Weakness classification (CWE)

CWE-290 — Authentication Bypass by Spoofing

References

audit@patchstack.com (vdb-entry)

Frequently asked questions

What is CVE-2026-66674?: CVE-2026-66674 is a medium-severity vulnerability in Elliot Sowers/ Relywp Simple Cloudflare Turnstile, classified under Authentication Bypass by Spoofing. CVSS score: 5.6/10. Published 2026-09-10.
How severe is CVE-2026-66674?: Medium severity. CVSS v3 base score is 5.6 out of 10.