ZDF
Sign inSign up

Vulnerabilities

Vulnerability · GHSA-qm9x-rmcj-h2rc

Authenticated RCE: Twig sandbox "on/as" behavior injection via "Asset::getMimeType" transform

Published Oct 5, 2026 · catalog updated Oct 5, 2026 · Authenticated RCE: Twig sandbox

Last checked Nov 1, 2026. A connected source was read within the last 7 days.

Open the advisory

Exploitation likelihood is not on this record for GHSA-qm9x-rmcj-h2rc. A missing EPSS score is not a low risk. Compare Authenticated RCE: Twig sandbox with the linked advisory before you change production.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Authenticated RCE: Twig sandbox).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
  • EPSS is missing. A missing score is not a low risk.
Severity
High—
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
Awaiting synchronization with FIRST
Remediation
Version ranges on file
Affected products
composer craftcms/cms

The method passes a caller-supplied transform array to , which — after rejecting only the key — calls with no cleanse. Surviving / keys are honored during (a ) construction, attaching an attacker-controlled behavior/event handler and firing , yielding authenticated remote code execution. Reachability gate (identical to published advisory GHSA-f5wm-88jv-g5hx): (default false) plus authenticated Control Panel access, via the B1/B2 sandbox-render entry points ( , ). ### Impact Authenticated (Control Panel user) remote code execution as the web user via Yii behavior/event injection through a distinct sink ( ). Report ID: 1718

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • composer craftcms/cms>= 5.0.0, <= 5.11.0

How to fix GHSA-qm9x-rmcj-h2rc

  • Upgrade

    GHSA-qm9x-rmcj-h2rc lists a fix boundary at 5.11.0. Compare the installed build with that boundary before you change production.

  • Version check

    Affected <= 5.11.0

  • Advisory

    Open the inventory_github record and follow its fix.

  • Official advisories

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

Exploitation likelihood is not on this record for GHSA-qm9x-rmcj-h2rc. A missing EPSS score is not a low risk. Compare Authenticated RCE: Twig sandbox with the linked advisory before you change production.

Which versions are affected?

Compare what you have installed with >= 5.0.0, <= 5.11.0. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-94: Code Injection. EPSS is not on this record yet. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Craft CMS security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 5, 2026 · Maintainer security tabs

    Detected

    The method passes a caller-supplied transform array to , which — after rejecting only the key — calls with no cleanse. Surviving / keys are honored during (a ) construction, attaching an attacker-controlled behavior/event handler and firing , yielding authenticated remote code execution. Reachability gate (identical to published advisory GHSA-f5wm-88jv-g5hx): (default false) plus authenticated Con

Sources

  • Maintainer security tabsVendor advisoryGHSA-qm9x-rmcj-h2rc

    The method passes a caller-supplied transform array to , which — after rejecting only the key — calls with no cleanse. Surviving / keys are honored during (a ) construction, attaching an attacker-controlled behavior/event handler and firing , yielding authenticated remote code execution. Reachability gate (identical to published advisory GHSA-f5wm-88jv-g5hx): (default false) plus authenticated Con

    github.com

Freshness

Last verified in this catalog Oct 5, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • Maintainer security tabsNov 1, 2026