Is CVE-2026-33157 in the CISA KEV catalog?

No. CVE-2026-33157 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-33157?

CVE-2026-33157 has a CVSS v3 base score of 7.2 (HIGH).

What is the EPSS score for CVE-2026-33157?

CVE-2026-33157 has an EPSS score of 1.02% (60th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-33157?

Upgrade craft cms to 5.9.13 or later.

CVE & CISA-KEV Catalog

CVE-2026-33157

HIGH

7.2

CVSS v3

NVD

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.

CWE-470

How to fix

Remediation Available

craft cmsNVD

Affected:>= 5.6.0, < 5.9.13Fixed in:5.9.13CVE-2026-33157derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredHigh

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

1.02%probability of exploitation in 30 days

60thpercentile

Moderate risk: more likely to be exploited than 60% of all known CVEs.

References

Patch1

github.com

Exploit1

github.com

Release Notes1

github.com

Related Vulnerabilities

Other CWE-470 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2021-21985	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2024-4990	Critical	9.1	79%	-	-
CVE-2024-0200	High	7.2	72%	-	Fix
CVE-2022-30287	High	8.0	70%	-	Fix
CVE-2025-3600	High	7.5	19%	-	-
CVE-2018-5511	High	7.2	15%	-	-

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-03-26.