CVE-2026-0740Public exploitNetwork attack vector

Unauthenticated code execution via destination filename override

Published Apr 7, 2026 · Updated Apr 7, 2026

Arbitrary file upload in Saturday Drive Ninja Forms File Uploads 3.3.26 and earlier allows remote attackers to write files to the server. The unauthenticated AJAX flow issues an upload nonce for an arbitrary field ID, then handle_upload trusts a client-supplied destination filename when calling move_uploaded_file, bypassing extension checks. The add-on only needs to be active; no form or upload field is required, and executable server-side files grant code execution under the web service account.

CVSS severity9.8
Critical
EPSS probability62.90%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Arbitrary file upload in Saturday Drive Ninja Forms File Uploads 3.3.26 and earlier allows remote attackers to write files to the server. The unauthenticated AJAX flow issues an upload nonce for an arbitrary field ID, then handle_upload trusts a client-supplied destination filename when calling move_uploaded_file, bypassing extension checks. The add-on only needs to be active; no form or upload field is required, and executable server-side files grant code execution under the web service account.

The record

CVE
CVE-2026-0740
Published
Apr 7, 2026
Updated
Apr 7, 2026
Vendor
Saturday Drive
Product
Ninja Forms File Uploads
Classifications
CWE-434, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 7, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 7, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=3.3.26

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Saturday Drive · Ninja Forms File Uploadsversion=0 <=3.3.26

Published CVSS scores

9.8WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo