CVE-2026-32263: Craftcms/cms Remote Code Execution Vulnerability

HIGH
Advisory Identifier: GHSA-qx2q-q59v-wf3j
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CWE-470
Published
Advisory Summary

CVE-2026-32263 is a HIGH remote code execution vulnerability (CWE-470: Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection')) affecting Craftcms/cms libraries in the Packagist ecosystem. The issue involves craft cms vulnerable to behavior injection rce via entrytypescontroller. Remediation is available by upgrading affected packages to version 5.9.11.

CVE-2026-32263 at a Glance

CVE Identifier CVE-2026-32263
GHSA Identifier GHSA-qx2q-q59v-wf3j
Severity HIGH
CVSS v3.1 Base Score N/A
CWE Classification CWE-470: Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection')
Affected Product Craftcms/cms
Package Ecosystem Packagist
Published Date
Last Updated

How to Fix CVE-2026-32263

To remediate this vulnerability, upgrade all affected Craftcms/cms dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

craftcms/cms fixed: 5.9.11 
Upgrade craftcms/cms to 5.9.11
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for craftcms/cms

How to Check if You Are Affected

To determine whether your application is affected by CVE-2026-32263, inspect your project dependencies for Craftcms/cms:

inspect dependencies for craftcms/cms

Analyze the terminal output to locate any version of Craftcms/cms in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 5.9.11), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-470: Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection'), where the product uses external input with reflection to select which classes or code to use, but it does not sufficiently prevent the input from selecting improper classes or code. In Craftcms/cms, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

The fix for GHSA-7jx7-3846-m7w7 (commit 395c64f0b80b507be1c862a2ec942eaacb353748) only patched `src/services/Fields.php`, but the same vulnerable pattern exists in `EntryTypesController::actionApplyOverrideSettings()`. In `src/controllers/EntryTypesController.php` lines 381-387: ```php $settingsStr = $this->request->getBodyParam('settings'); parse_str($settingsStr, $postedSettings); $settingsNamespace = $this->request->getRequiredBodyParam('settingsNamespace'); $settings = array_filter(ArrayHelper::getValue($postedSettings, $settingsNamespace, [])); if (!empty($settings)) { Craft::configure($entryType, $settings); ``` The `$settings` array from `parse_str` is passed directly to `Craft::configure()` without `Component::cleanseConfig()`. This allows injecting Yii2 behavior/event handlers via `as ` or `on ` prefixed keys, the same attack vector as the original advisory. You need Craft control panel administrator permissions, and `allowAdminChanges` must be enabled for this to work. An attacker can use the same gadget chain from the original advisory to achieve RCE. Users should update to Craft 5.9.11 to mitigate the issue.

CVE-2026-32263 Affected Craftcms/cms Versions

1 component(s)
Fixed Versions:
5.9.11
Product / Package Ecosystem Affected Versions Fixed Version
craftcms/cms
 Packagist
≥ 5.6.0
< 5.9.11
5.9.11

References

GitHub Advisory / Wiki ADVISORY
https://github.com/craftcms/cms/security/advisories/GHSA-7jx7-3846-m7w7
GitHub Advisory / Wiki ADVISORY
https://github.com/craftcms/cms/security/advisories/GHSA-qx2q-q59v-wf3j
NVD — CVE-2026-32263 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-32263
Security Fix Commit FIX COMMIT
https://github.com/craftcms/cms/commit/d37389dbffafa565143be40a2ab1e1db22a863f7
Craftcms/cms Source Repository REPOSITORY
https://github.com/craftcms/cms

Frequently Asked Questions

What is CVE-2026-32263?
CVE-2026-32263 is a security vulnerability in Craftcms/cms involving Craft CMS vulnerable to behavior injection RCE via EntryTypesController under CWE-470: Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection').
Which Craftcms/cms versions are affected?
Affected versions include releases prior to 5.9.11 across affected packages: craftcms/cms.
What version fixes CVE-2026-32263?
Upgrading to 5.9.11 (or the latest patched release for your respective branch) resolves the vulnerability.
Is craftcms/cms affected?
Yes, craftcms/cms is affected in releases prior to 5.9.11. Upgrade your dependency to 5.9.11 or later.
What CWE is associated with CVE-2026-32263?
CVE-2026-32263 is classified under CWE-470: Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection') (The product uses external input with reflection to select which classes or code to use, but it does not sufficiently prevent the input from selecting improper classes or code.).
How can I check Packagist dependencies for CVE-2026-32263?
Run the dependency tree command: 'inspect dependencies for craftcms/cms'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-qx2q-q59v-wf3j",
  "modified" : "2026-03-16T21:57:33Z",
  "published" : "2026-03-16T18:12:32Z",
  "aliases" : [ "CVE-2026-32263" ],
  "summary" : "Craft CMS vulnerable to behavior injection RCE via EntryTypesController",
  "details" : "The fix for GHSA-7jx7-3846-m7w7 (commit 395c64f0b80b507be1c862a2ec942eaacb353748) only patched `src/services/Fields.php`, but the same vulnerable pattern exists in `EntryTypesController::actionApplyOverrideSettings()`.\n\nIn `src/controllers/EntryTypesController.php` lines 381-387:\n\n```php\n$settingsStr = $this->request->getBodyParam('settings');\nparse_str($settingsStr, $postedSettings);\n$settingsNamespace = $this->request->getRequiredBodyParam('settingsNamespace');\n$settings = array_filter(ArrayHelper::getValue($postedSettings, $settingsNamespace, []));\n\nif (!empty($settings)) {\n    Craft::configure($entryType, $settings);\n```\n\nThe `$settings` array from `parse_str` is passed directly to `Craft::configure()` without `Component::cleanseConfig()`. This allows injecting Yii2 behavior/event handlers via `as ` or `on ` prefixed keys, the same attack vector as the original advisory.\n\nYou need Craft control panel administrator permissions, and `allowAdminChanges` must be enabled for this to work.\n\nAn attacker can use the same gadget chain from the original advisory to achieve RCE.\n\nUsers should update to Craft 5.9.11 to mitigate the issue.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "craftcms/cms"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "5.6.0"
      }, {
        "fixed" : "5.9.11"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 5.9.10"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/craftcms/cms/security/advisories/GHSA-7jx7-3846-m7w7"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/craftcms/cms/security/advisories/GHSA-qx2q-q59v-wf3j"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-32263"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/craftcms/cms/commit/d37389dbffafa565143be40a2ab1e1db22a863f7"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/craftcms/cms"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-470" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-03-16T18:12:32Z",
    "nvd_published_at" : "2026-03-16T20:16:19Z"
  }
}