CVE-2026-81780

Received Received - Intake

Unauthenticated Arbitrary File Upload in Hash Form

Publication date: 2026-08-31

Last updated on: 2026-08-31

Assigner: Patchstack

Description

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

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-08-31

Last Modified

2026-08-31

Generated

2026-09-01

AI Q&A

2026-09-01

EPSS Evaluated

N/A

NVD

CVE-2026-81780

Affected Vendors & Products

Vendor	Product	Version / Range
patchstack	hash_form	1.4.2

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-434	The product allows the upload or transfer of dangerous file types that are automatically processed within its environment.

Attack-Flow Graph

Executive Summary

This is an unauthenticated arbitrary file upload vulnerability in Hash Form versions 1.4.2 and below. It allows attackers to upload malicious files without authentication, potentially leading to remote code execution or other attacks.

Impact Analysis

An attacker could exploit this to upload malicious files to your server, potentially gaining control over your system, stealing data, or defacing your website. The high CVSS score indicates severe impact.

Compliance Impact

This vulnerability could lead to data breaches, violating GDPR's data protection requirements and HIPAA's security rules. Non-compliance may result in legal penalties, fines, and reputational damage.

Mitigation Strategies

Immediately update Hash Form to the latest version to patch the unauthenticated arbitrary file upload vulnerability. If an update is not available, consider disabling or removing the plugin until a fix is released.

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