CVE-2026-11407: Pimcore/pimcore Pimcore CMS Twig Sandbox Bypass Vulnerability

HIGH
Advisory Identifier: GHSA-7p36-fq2r-4h7r
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CVSS 7.2
CWE-1336
Published
Advisory Summary

CVE-2026-11407 is a HIGH (CVSS 7.2) pimcore cms twig sandbox bypass vulnerability (CWE-1336: Improper Neutralization of Special Elements Used in a Template Engine) affecting Pimcore/pimcore libraries in the Packagist ecosystem. The issue involves pimcore cms twig sandbox bypass via securitypolicy checkmethodallowed. Remediation is available in the latest vendor maintenance releases.

CVE-2026-11407 at a Glance

CVE Identifier CVE-2026-11407
GHSA Identifier GHSA-7p36-fq2r-4h7r
Severity HIGH
CVSS v3.1 Base Score 7.2
CWE Classification CWE-1336: Improper Neutralization of Special Elements Used in a Template Engine
Affected Product Pimcore/pimcore
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 7.2

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required High (PR:H)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2026-11407

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

pimcore/pimcore fixed: Latest secure release 
Upgrade pimcore/pimcore to Latest secure release
pimcore/pimcore fixed: Latest secure release 
Upgrade pimcore/pimcore to Latest secure release
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 pimcore/pimcore

How to Check if You Are Affected

To determine whether your application is affected by CVE-2026-11407, inspect your project dependencies for Pimcore/pimcore:

inspect dependencies for pimcore/pimcore

Analyze the terminal output to locate any version of Pimcore/pimcore in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), 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-1336: Improper Neutralization of Special Elements Used in a Template Engine, where the product uses a template engine to insert or process externally-influenced input, but it does not neutralize or incorrectly neutralizes special elements or syntax that can be interpreted as template expressions or other code directives when processed by the engine. In Pimcore/pimcore, 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

Pimcore CMS/DXP version 12.3.8 contains a sandbox bypass vulnerability that allows authenticated administrative attackers to execute arbitrary methods on PHP objects by exploiting empty checkMethodAllowed() and checkPropertyAllowed() implementations in the custom Twig SecurityPolicy. Attackers can supply malicious Twig templates through the DataObject ClassDefinition Layout\Text component to perform arbitrary file reads, execute arbitrary database queries, and potentially achieve remote code execution via PHP object gadget chains, with the pimcore_* function wildcard further broadening the bypass to all Pimcore Twig functions.

CVE-2026-11407 Affected Pimcore/pimcore Versions

2 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
pimcore/pimcore
 Packagist
≥ 12.0.0-RC1
≤ 12.3.8
pimcore/pimcore
 Packagist
≤ 11.5.14.1

References

NVD — CVE-2026-11407 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-11407
Pimcore/pimcore Source Repository REPOSITORY
https://github.com/pimcore/pimcore/pull/19193
Security Fix Commit FIX COMMIT
https://github.com/pimcore/pimcore/commit/fffa7f6396329e88610db70a8652529bbc734892
Pimcore/pimcore Source Repository REPOSITORY
https://github.com/pimcore/pimcore
Pimcore/pimcore Security Information SECURITY
https://www.vulncheck.com/advisories/pimcore-cms-twig-sandbox-bypass-via-securitypolicy-checkmethodallowed

Frequently Asked Questions

What is CVE-2026-11407?
CVE-2026-11407 is a security vulnerability in Pimcore/pimcore involving Pimcore CMS Twig Sandbox Bypass via SecurityPolicy checkMethodAllowed under CWE-1336: Improper Neutralization of Special Elements Used in a Template Engine.
Which Pimcore/pimcore versions are affected?
Affected versions include releases prior to current release patches across affected packages: pimcore/pimcore.
What version fixes CVE-2026-11407?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is pimcore/pimcore affected?
Yes, pimcore/pimcore is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of CVE-2026-11407?
CVE-2026-11407 has a CVSS v3.1 base score of 7.2 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2026-11407?
CVE-2026-11407 is classified under CWE-1336: Improper Neutralization of Special Elements Used in a Template Engine (The product uses a template engine to insert or process externally-influenced input, but it does not neutralize or incorrectly neutralizes special elements or syntax that can be interpreted as template expressions or other code directives when processed by the engine.).
How can I check Packagist dependencies for CVE-2026-11407?
Run the dependency tree command: 'inspect dependencies for pimcore/pimcore'. 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-7p36-fq2r-4h7r",
  "modified" : "2026-09-02T16:05:13Z",
  "published" : "2026-06-17T21:34:38Z",
  "aliases" : [ "CVE-2026-11407" ],
  "summary" : "Pimcore CMS Twig Sandbox Bypass via SecurityPolicy checkMethodAllowed",
  "details" : "Pimcore CMS/DXP version 12.3.8 contains a sandbox bypass vulnerability that allows authenticated administrative attackers to execute arbitrary methods on PHP objects by exploiting empty checkMethodAllowed() and checkPropertyAllowed() implementations in the custom Twig SecurityPolicy. Attackers can supply malicious Twig templates through the DataObject ClassDefinition Layout\\Text component to perform arbitrary file reads, execute arbitrary database queries, and potentially achieve remote code execution via PHP object gadget chains, with the pimcore_* function wildcard further broadening the bypass to all Pimcore Twig functions.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H"
  }, {
    "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" : "pimcore/pimcore"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "12.0.0-RC1"
      }, {
        "last_affected" : "12.3.8"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "pimcore/pimcore"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "11.5.14.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-11407"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pimcore/pimcore/pull/19193"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pimcore/pimcore/commit/fffa7f6396329e88610db70a8652529bbc734892"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/pimcore/pimcore"
  }, {
    "type" : "WEB",
    "url" : "https://www.vulncheck.com/advisories/pimcore-cms-twig-sandbox-bypass-via-securitypolicy-checkmethodallowed"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-1336" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-06-19T14:48:25Z",
    "nvd_published_at" : "2026-06-17T20:16:48Z"
  }
}