pimcore/pimcore security advisory

CVE-2026-11407: Pimcore CMS Twig Sandbox Bypass via SecurityPolicy checkMethodAllowed

CVE-2026-11407 is a high-severity remote code execution vulnerability in the PHP package pimcore/pimcore (CVSS 7.2), published 17 June 2026. The advisory does not name a fixed version. Exploiting it needs an admin-level account.

high 7.2 published 2026-06-17 · updated 2026-10-26

Affected versions: <= 11.5.14.1
>= 12.0.0-RC1, <= 12.3.8
Fixed in: not stated
Newest release: 2026.3.4
Severity: High · CVSS 7.2
Type: Remote code execution
CWE-1336
Exploited in the wild: Not on the CISA KEV list
checked 2026-11-04

Is your pimcore/pimcore version affected?

Run composer show pimcore/pimcore in your project, then enter the version. We check it against this and every other known pimcore/pimcore advisory.

Who can exploit CVE-2026-11407

Access: A high-privilege account in the app, such as an admin.

CVSS vector (scored by VulnCheck): CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Your app is only exposed if it uses the affected part of pimcore/pimcore. The advisory below says which part that is. If you are not sure, upgrade anyway: it costs less than finding out.

How to fix CVE-2026-11407 in pimcore/pimcore

Find the installed version: composer show pimcore/pimcore. If you never required it yourself, composer why pimcore/pimcore shows which package pulls it in.
Update it: composer update pimcore/pimcore --with-all-dependencies.
If Composer will not go that high, your composer.json constraint is holding it back. Widen it (for example "pimcore/pimcore": "^2026.3.4" if you can take that version), or upgrade the package that requires it.
Run composer audit. It reads the same advisory data and should no longer list CVE-2026-11407.
Commit composer.lock and deploy it. On the server, run composer install --no-dev from the lock file, not composer update.

If you cannot upgrade yet

General hardening for remote code execution issues while the upgrade waits. None of it replaces the fix.

Never pass user-controlled data to unserialize() or to template rendering, and restrict who can edit templates or settings.
Put a web application firewall in front of the app and watch for new PHP files or admin users.
If your app does not use the affected feature, note that in your audit, but still plan the upgrade.

The CVE-2026-11407 advisory

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.

Description from the CVE record, published by VulnCheck (the CVE Numbering Authority), via the NVD entry for CVE-2026-11407. Advisory title: “Pimcore CMS Twig Sandbox Bypass via SecurityPolicy checkMethodAllowed”.

References

GitHub advisory GHSA-7p36-fq2r-4h7r github.com
Vulncheck security advisory www.vulncheck.com
Fix commit fffa7f6 github.com
Pull request #19193 github.com

Other pimcore/pimcore advisories

high CVE-2026-55416: Pimcore: SQL Injection in Custom Reports via Malicious Report Configuration 2026-09-10
critical CVE-2026-55634: Pimcore Vulnerable to Remote Code Execution via DataObject Class-Definition Field Name 2026-08-28
critical CVE-2026-55220: Pimcore Hotspotimage getDataFromResource() unrestricted Serialize::unserialize over object-store column (PHP Object Injection, CWE-502) 2026-08-28
high CVE-2026-55072: Pimcore: ClassDefinition UID regex missing end anchor allows SQL injection via Block.php unquoted table name 2026-08-13
high CVE-2026-5394: Pimcore Platform - SQL Injection in DataObject composite index handling during class definition import/save 2026-05-28
high CVE-2026-45704: Pimcore has a CustomReports Share Bypass 2026-05-27

Need help patching or upgrading? Laskyr does PHP and Laravel security fixes and upgrades. Tell us what you run and we reply with a plan and a price.

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Where this data comes from

Affected and fixed versions: the Packagist security advisories API (GitHub Advisory Database and FriendsOfPHP), the same data composer audit uses. Synced 2026-11-03.
Description, score, weakness and references: NIST National Vulnerability Database (NVD), checked 2026-11-04. This product uses data from the NVD API but is not endorsed or certified by the NVD.
Exploited-in-the-wild status: the CISA Known Exploited Vulnerabilities catalog, checked 2026-11-04.
Compiled by Daniel Lasek at Laskyr from the sources above. The summary, “who can exploit it”, “how to fix it” and hardening sections are our plain-English reading of the record and are generated from it. The quoted description is the record's own text. Spot an error? Tell us.