CVE-2026-66632

CVE-2026-66632

Unauthenticated Content Injection in Simple Cloudflare Turnstile <= 1.42.1 versions.

Vulnerability class: RCE (Remote Code Execution)

Published · last modified .

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.003 (20.4th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 20th percentile — 20.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-66632: held from 0.003 to 0.003.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-66632?
CVE-2026-66632 is a medium-severity vulnerability, classified under Code Injection. CVSS score: 6.5/10. Published 2026-09-10.
How severe is CVE-2026-66632?
Medium severity. CVSS v3 base score is 6.5 out of 10.