# CVE-2026-124430: Craft CMS remote code execution via render-elements signing oracle

Source: https://junglewise.ai/threats/cve-2026-124430-craft-cms-from-5-10-0-before-5-11-2-contains-a-remote-code  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-08. Updated: 2026-11-08  
License: CC BY 4.0 with a link back

CVE-2026-124430 · Severity: high · CVSS 8.8 · Published 2026-11-08

Craft CMS, a popular web content management system, contains a critical flaw that allows authenticated control panel users to execute arbitrary commands on the server. An attacker with a valid user account can trick the system into executing malicious code with the same privileges as the web server, potentially exposing sensitive data like security keys, databases, and site content.

Technologies: [Craft CMS CMS](https://junglewise.ai/threats/technologies/craft-cms-cms). Vendors: [Craft CMS](https://junglewise.ai/threats/vendors/craft-cms).

## Quick answers

**Is CVE-2026-124430 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-124430 being exploited in the wild.

**How severe is CVE-2026-124430?** High severity, with a CVSS score of 8.8, published 8 November 2026.

**Which products and versions are affected?** Craft CMS CMS 5.10.0 before 5.11.2.

**Is there a fix for CVE-2026-124430?** Yes: fixed in 5.11.2. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-124430 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-124430?** Check whether you run Craft CMS CMS at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in 5.11.2

## Technical details

The vulnerability exists in the app/render-elements endpoint, which allows non-administrator users to obtain HMAC-signed Twig templates. An attacker can manipulate the returnUrl parameter with a templated payload, submit it as a login redirect, and after authentication, the system evaluates this template through the unsandboxed renderObjectTemplate() function, which executes native PHP callables and OS commands. The vulnerability requires authentication and control panel access but no user interaction beyond login.

## Affected products

- Craft CMS CMS 5.10.0 before 5.11.2

## Timeline

- 2026-10-23: disclosed
- 2026-11-08: advisory

## References

- [https://github.com/craftcms/cms/security/advisories/GHSA-qj3q-j7r4-428p](https://github.com/craftcms/cms/security/advisories/GHSA-qj3q-j7r4-428p)
- [https://www.vulncheck.com/advisories/craft-cms-5.10.0-before-5.11.2-rce-via-app-render-elements-signing-oracle](https://www.vulncheck.com/advisories/craft-cms-5.10.0-before-5.11.2-rce-via-app-render-elements-signing-oracle)

## Related threats

- [Craft CMS GraphQL authorization bypass in entry mutations](https://junglewise.ai/threats/cve-2026-112776-craft-cms-from-5-0-0-before-5-11-0-contains-an-authorization)
- [Craft CMS authenticated remote code execution via Twig sandbox escape](https://junglewise.ai/threats/cve-2026-112772-craft-cms-from-5-0-0-before-5-11-0-contains-a-remote-code)
- [Craft CMS missing authorization in app/switch-to-licensed-edition](https://junglewise.ai/threats/cve-2026-109306-craft-cms-from-5-0-0-before-5-10-14-contains-a-missing)