CVE-2026-86730Network attack vector

Authenticated code execution via field-layout behavior injection

Published Sep 8, 2026 · Updated Sep 8, 2026

Object injection in Pixel & Tonic Craft CMS 5.0.0-RC1 through 5.10.11 allows remote authenticated users to execute code. String-encoded field-layout tab elements bypass configuration cleansing, allowing Yii2 behavior attachments and event handlers to reach Craft::createObject(). Any authenticated control-panel account can trigger arbitrary object instantiation and execute code with the web process's privileges.

CVSS severityUnavailable
Unscored
EPSS probability0.39%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Object injection in Pixel & Tonic Craft CMS 5.0.0-RC1 through 5.10.11 allows remote authenticated users to execute code. String-encoded field-layout tab elements bypass configuration cleansing, allowing Yii2 behavior attachments and event handlers to reach Craft::createObject(). Any authenticated control-panel account can trigger arbitrary object instantiation and execute code with the web process's privileges.

The record

CVE
CVE-2026-86730
Published
Sep 8, 2026
Updated
Sep 8, 2026
Vendor
Pixel & Tonic
Product
Craft CMS
Classifications
T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 8, 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=5.0.0-RC1 <5.10.12

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Pixel & Tonic · Craft CMSversion=5.0.0-RC1 <5.10.12

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.

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

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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

Technologies

Your stack

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Your stack

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