CVE-2026-33157: Craft CMS is a content management system (CMS)

This month

HIGH 7.2UPGRADE

CVE-2026-33157 is a high-severity flaw (CVSS 7.2) affecting craft cms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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). Ho

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	7.2 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	1.1% (top 34%)
CISA exploited list	No
Weakness	CWE-470
Published	2026-03-24
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: craftcms

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-03-24 18:16 UTCPublished CVE record published
2026-06-17 10:37 UTCUpdated Record last modified

craftcms craft cms UPGRADE

Affected: >= 5.6.0 and < 5.9.13

Fixed in: 5.9.13

Safe to downgrade to: a release before 5.6.0

1. Check installed version

apt-cache policy craft-cms || rpm -q craft-cms || craft-cms --version

2. UPGRADE to 5.9.13 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade craft-cms

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade craft-cms

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 5.6.0 (Debian / Ubuntu)

apt-cache madison craft-cms sudo apt install craft-cms=<VERSION_BEFORE_5.6.0> sudo apt-mark hold craft-cms

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list craft-cms sudo dnf downgrade craft-cms-<VERSION_BEFORE_5.6.0> sudo dnf versionlock add craft-cms

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-33157?

craft cms: upgrade to 5.9.13. Exact commands for each OS are on this page.

Is CVE-2026-33157 being exploited?

CVE-2026-33157 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-33157 affect?

CVE-2026-33157 affects craft cms. Severity is high (CVSS 7.2). 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

How urgent is CVE-2026-33157?

Priority 47/100. High severity; Public exploit reference

Related CVEs

CVE-2026-29113 MEDIUM 4.3 UPGRADE Craft is a content management system (CMS)
CVE-2026-33162 MEDIUM 6.5 UPGRADE Craft CMS is a content management system (CMS)
CVE-2026-33161 MEDIUM 4.3 UPGRADE Craft CMS is a content management system (CMS)
CVE-2026-33160 MEDIUM 5.3 UPGRADE Craft CMS is a content management system (CMS)
CVE-2026-33159 MEDIUM 6.5 UPGRADE Craft CMS is a content management system (CMS)

References

← Back to latest CVEs