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CVE-2026-33157

Craftcms Craft CMS remote code execution

7.2 HIGHPublic exploitEPSS 1.06%
  1. Published24 Mar 2026

Description

Craft CMS is a content management system (CMS). From version 5.6.0 to before version 5.9.13, a Remote Code Execution (RCE) vulnerability exists in Craft CMS, it can be exploited by any authenticated user with control panel access. This is a bypass of a previous fix. The existing patches add cleanseConfig() to assembleLayoutFromPost() and various FieldsController actions to strip Yii2 behavior/event injection keys ("as" and "on" prefixed keys). However, the fieldLayouts parameter in ElementIndexesController::actionFilterHud() is passed directly to FieldLayout::createFromConfig() without any sanitization, enabling the same behavior injection attack chain. This issue has been patched in version 5.9.13.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredHigh
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Affected products

Craftcms Craft CMS≥ 5.6.0 < 5.9.13

Remediation

Fixed in
Craftcms Craft CMS≥ 5.9.13

References

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Frequently asked

Is CVE-2026-33157 being actively exploited?

CVE-2026-33157 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 1.06%.

How severe is CVE-2026-33157?

CVE-2026-33157 has a CVSS 3.1 base score of 7.2, rated high. EPSS estimates a 1.06% probability of exploitation.

Which products are affected by CVE-2026-33157?

Affected products include Craftcms Craft CMS.

How do I fix CVE-2026-33157?

Upgrade affected software to a fixed version, for example Craftcms Craft CMS 5.9.13 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-33157 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.