What is CVE-2026-81780?

CVE-2026-81780 is a critical-severity vulnerability in Hashthemes Hash Form, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 10.0/10. Published 2026-08-31.

How severe is CVE-2026-81780?

Critical severity. CVSS v3 base score is 10.0 out of 10.

Arbitrary file upload in Hashthemes Hash Form

CVE-2026-81780

Unauthenticated Arbitrary File Upload in Hash Form <= 1.4.2 versions.

Vulnerability class: Unrestricted File Upload

CVSS v3 metric

CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.

Affected products

Hashthemes Hash Form

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

References

audit@patchstack.com (vdb-entry)

Frequently asked questions

What is CVE-2026-81780?: CVE-2026-81780 is a critical-severity vulnerability in Hashthemes Hash Form, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 10.0/10. Published 2026-08-31.
How severe is CVE-2026-81780?: Critical severity. CVSS v3 base score is 10.0 out of 10.