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Vulnerabilities

Vulnerability · GHSA-qj3q-j7r4-428p

"app/render-elements" return URL signing oracle leads to RCE

Published Oct 23, 2026 · catalog updated Oct 23, 2026 · "app/render-elements" return URL signing

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-qj3q-j7r4-428p. A missing EPSS score is not a low risk. Compare "app/render-elements" return URL signing 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 ("app/render-elements" return URL signing).
  • 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

Craft allows a non-administrator control panel user to obtain a valid HMAC over an attacker-selected Twig object template. The endpoint forwards request-controlled element-instance configuration to . With , a non-modal context, and a templated , Craft signs the supplied template with its global security key and returns the signed value in generated HTML. The signature is not bound to its original purpose. The same signed value can be submitted as the parameter to the login action. Following successful authentication, Craft validates the signature and evaluates the template through the unsandboxed path. This reaches native PHP callables and permits operating system command execution with the PHP worker’s privileges. ### Impact * Successful exploitation gives a control panel user arbitrary command execution as the PHP/web-server worker. This can expose the Craft security key, database, and environment credentials, CMS content, and other files readable by that process. Report ID: 1882

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>= 5.10.0, < 5.11.2

How to fix GHSA-qj3q-j7r4-428p

  • Upgrade

    GHSA-qj3q-j7r4-428p lists a fix boundary at 5.11.2. Compare the installed build with that boundary before you change production.

  • Version check

    Affected < 5.11.2

  • 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-qj3q-j7r4-428p. A missing EPSS score is not a low risk. Compare "app/render-elements" return URL signing with the linked advisory before you change production.

Which versions are affected?

Compare what you have installed with >= 5.10.0, < 5.11.2. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. 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 23, 2026 · Maintainer security tabs

    Detected

    Craft allows a non-administrator control panel user to obtain a valid HMAC over an attacker-selected Twig object template. The endpoint forwards request-controlled element-instance configuration to . With , a non-modal context, and a templated , Craft signs the supplied template with its global security key and returns the signed value in generated HTML. The signature is not bound to its original

Sources

  • Maintainer security tabsVendor advisoryGHSA-qj3q-j7r4-428p

    Craft allows a non-administrator control panel user to obtain a valid HMAC over an attacker-selected Twig object template. The endpoint forwards request-controlled element-instance configuration to . With , a non-modal context, and a templated , Craft signs the supplied template with its global security key and returns the signed value in generated HTML. The signature is not bound to its original

    github.com

Freshness

Last verified in this catalog Oct 23, 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