Exploitation reportedNot in CISA KEV yet

CVE-2026-0740

Exploitation reported by one source. First attested on 2026-04-08 by GCVE · kevintel.

Published2026-04-07
WeaknessCWE-434

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

The Ninja Forms - File Uploads plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the 'NF_FU_AJAX_Controllers_Uploads::handle_upload' function in all versions up to, and including, 3.3.26. This makes it possible for unauthenticated attackers to upload arbitrary files on the affected site's server which may make remote code execution possible. Note: The vulnerability was partially patched in version 3.3.25 and fully patched in version 3.3.27.

Timeline

dates in UTC

2026-04-0705:16CVE publishedNVD
2026-04-0815:49Listed as exploited by GCVEGCVE
2026-04-0815:49Exploitation first reportedGCVE
2026-10-2319:23First public proof of conceptPoC-in-GitHub
2026-10-2319:23EPSS crossed 10 %FIRST EPSS

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-0740?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-0740?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

Neither OSV.dev nor the vendor advisories we read list affected versions for CVE-2026-0740 yet.

Full record on NVD

Fix

No fix published by the sources we read yet. NVD record

Detection

read 2026-10-23 19:24 UTC

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: 8 repositories, unverifiedwhattheslime/CVE-2026-0740xShadow-Here/CVE-2026-07400xgh057r3c0n/CVE-2026-0740murrez/CVE-2026-0740a24ac1/CVE-2026-0740

Sources

NVDCVE recordread 2026-10-23
GCVEexploitation2026-04-08
CISA-ADPSSVC decisionnone2026-04-07
OpenCVESSVC decisionnone—
CNACVSS 3.19.8read 2026-10-23
CNAweakness (CWE)CWE-434read 2026-10-23
FIRST EPSSEPSS score62.9 %read 2026-10-23
PoC-in-GitHubproof of concept8read 2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: 2026-04-07
Last Modified: 2026-06-17
NVD status: Deferred

Frequently asked questions

What is CVE-2026-0740?

Is CVE-2026-0740 actively exploited?

Active exploitation of CVE-2026-0740 has not been confirmed. Its EPSS score was 62.9% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-0740?

CVE-2026-0740 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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