CVE-2026-32264: Craftcms/cms Remote Code Execution Vulnerability

HIGH
Advisory Identifier: GHSA-4484-8v2f-5748
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CWE-470
Published
Advisory Summary

CVE-2026-32264 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 elementindexescontroller and fieldscontroller. Remediation is available by upgrading affected packages to version 4.17.5, 5.9.11.

CVE-2026-32264 at a Glance

CVE Identifier CVE-2026-32264
GHSA Identifier GHSA-4484-8v2f-5748
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-2026-32264

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: 4.17.5 
Upgrade craftcms/cms to 4.17.5
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-2026-32264, 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 4.17.5), 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 https://github.com/advisories/GHSA-7jx7-3846-m7w7 (commit https://github.com/craftcms/cms/commit/395c64f0b80b507be1c862a2ec942eaacb353748) only patched `src/services/Fields.php`, but the same vulnerable pattern exists in `ElementIndexesController` and `FieldsController`. 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 4.17.5 and 5.9.11 to mitigate the issue.

CVE-2026-32264 Affected Craftcms/cms Versions

2 component(s)
Fixed Versions:
4.17.55.9.11
Product / Package Ecosystem Affected Versions Fixed Version
craftcms/cms
 Packagist
≥ 4.0.0-RC1
< 4.17.5
4.17.5
craftcms/cms
 Packagist
≥ 5.0.0-RC1
< 5.9.11
5.9.11

References

GitHub Advisory / Wiki ADVISORY
https://github.com/craftcms/cms/security/advisories/GHSA-4484-8v2f-5748
GitHub Advisory / Wiki ADVISORY
https://github.com/craftcms/cms/security/advisories/GHSA-7jx7-3846-m7w7
NVD — CVE-2026-32264 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-32264
Security Fix Commit FIX COMMIT
https://github.com/craftcms/cms/commit/78d181e12e0b15e1300f54ec85f19859d3300f70
Security Fix Commit FIX COMMIT
https://github.com/craftcms/cms/commit/dfec46362fcb40b330ce8a4d8136446e65085620
Craftcms/cms Source Repository REPOSITORY
https://github.com/craftcms/cms

Frequently Asked Questions

What is CVE-2026-32264?
CVE-2026-32264 is a security vulnerability in Craftcms/cms involving Craft CMS vulnerable to behavior injection RCE ElementIndexesController and FieldsController 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 4.17.5, 5.9.11 across affected packages: craftcms/cms.
What version fixes CVE-2026-32264?
Upgrading to 4.17.5, 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 4.17.5, 5.9.11. Upgrade your dependency to 4.17.5, 5.9.11 or later.
What CWE is associated with CVE-2026-32264?
CVE-2026-32264 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-2026-32264?
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-4484-8v2f-5748",
  "modified" : "2026-03-16T21:57:50Z",
  "published" : "2026-03-16T18:13:15Z",
  "aliases" : [ "CVE-2026-32264" ],
  "summary" : "Craft CMS vulnerable to behavior injection RCE ElementIndexesController and FieldsController",
  "details" : "The fix for https://github.com/advisories/GHSA-7jx7-3846-m7w7 (commit https://github.com/craftcms/cms/commit/395c64f0b80b507be1c862a2ec942eaacb353748) only patched `src/services/Fields.php`, but the same vulnerable pattern exists in `ElementIndexesController` and `FieldsController`.\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 4.17.5 and 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" : "4.0.0-RC1"
      }, {
        "fixed" : "4.17.5"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 4.17.4"
    }
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "craftcms/cms"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "5.0.0-RC1"
      }, {
        "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-4484-8v2f-5748"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/craftcms/cms/security/advisories/GHSA-7jx7-3846-m7w7"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-32264"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/craftcms/cms/commit/78d181e12e0b15e1300f54ec85f19859d3300f70"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/craftcms/cms/commit/dfec46362fcb40b330ce8a4d8136446e65085620"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/craftcms/cms"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-470" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-03-16T18:13:15Z",
    "nvd_published_at" : "2026-03-16T20:16:19Z"
  }
}