What is CVE-2026-66634?

CVE-2026-66634 is a medium-severity vulnerability in Pantherius Modal Survey, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 4.3/10. Published 2026-08-18.

How severe is CVE-2026-66634?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Auth bypass in Pantherius Modal Survey

CVE-2026-66634

Subscriber Insecure Direct Object References (IDOR) in Modal Survey <= 2.0.2.2.3 versions.

Vulnerability class: IDOR (Insecure Direct Object Reference)

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.

Affected products

Pantherius Modal Survey

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

audit@patchstack.com (vdb-entry)

Frequently asked questions

What is CVE-2026-66634?: CVE-2026-66634 is a medium-severity vulnerability in Pantherius Modal Survey, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 4.3/10. Published 2026-08-18.
How severe is CVE-2026-66634?: Medium severity. CVSS v3 base score is 4.3 out of 10.