CVE-2026-91827Network attack vectorHinoki check available

Unauthenticated PHP object injection via CSV export

Published Sep 22, 2026 · Updated Sep 22, 2026

PHP object injection in Saturday Drive Ninja Forms 3.15.3 allows remote attackers to inject objects through stored form data during CSV export. The export path deserializes attacker-controlled form-field values when an administrator generates a CSV instead of treating those stored values as data. Exploitation requires an administrator to export the poisoned submission and a suitable POP chain from another plugin or theme; resulting actions include arbitrary file operations or code execution.

CVSS severityUnavailable
Unscored
EPSS probability0.30%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

PHP object injection in Saturday Drive Ninja Forms 3.15.3 allows remote attackers to inject objects through stored form data during CSV export. The export path deserializes attacker-controlled form-field values when an administrator generates a CSV instead of treating those stored values as data. Exploitation requires an administrator to export the poisoned submission and a suitable POP chain from another plugin or theme; resulting actions include arbitrary file operations or code execution.

The record

CVE
CVE-2026-91827
Published
Sep 22, 2026
Updated
Sep 22, 2026
Vendor
Saturday Drive
Product
Ninja Forms
Classifications
T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 22, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 22, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=3.15.3 <3.15.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Saturday Drive · Ninja Formsversion=3.15.3 <3.15.4

Published CVSS scores

No CVSS assessment is available in this record.

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.

Activity data is delayed. The latest report is Sep 28, 2026.

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

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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