# CVE-2026-86182: Diem CMF cross-site request forgery in admin console

Source: https://junglewise.ai/threats/cve-2026-86182-diem-cmf-cross-site-request-forgery-in-admin-console  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-06. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-86182 · Severity: medium · CVSS 4.3 · Published 2026-09-06

Diem is a content management framework for PHP that provides administrative functionality for managing website content. A vulnerability in the administrative console allows an attacker to trick a logged-in administrator into executing arbitrary commands on the web server by opening a specially crafted link, potentially leading to data theft, unauthorized modifications, and server compromise.

Technologies: [Diem-Project Diem](https://junglewise.ai/threats/technologies/diem). Vendors: [Diem-Project](https://junglewise.ai/threats/vendors/diem-project).

## Quick answers

**Is CVE-2026-86182 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-86182 being exploited in the wild.

**How severe is CVE-2026-86182?** Medium severity, with a CVSS score of 4.3, published 6 September 2026.

**Which products and versions are affected?** Diem-Project Diem up to 5.1.3.

**Is there a fix for CVE-2026-86182?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-86182 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-86182?** Check whether you run Diem-Project Diem 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.

## Technical details

The vulnerability is a cross-site request forgery (CSRF) in the dmConsole module's executeCommand action. The root cause is that the administrative plugin globally disables Symfony's CSRF protection (sfConfig::add(['sf_csrf_secret' => false]) and the executeCommand function accepts the privileged dm_command parameter via GET without validating a CSRF token or enforcing POST-only requests. An attacker can craft a malicious web page that uses client-side redirection to navigate an authenticated administrator's browser to the vulnerable endpoint, causing arbitrary command execution in the web server's security context. The attack requires no authentication and only user interaction (opening a link), and the vulnerable code path executes system commands with the privileges of the PHP/web-server process.

## Affected products

- diem-project Diem up to 5.1.3

## Timeline

- 2026-07-19: disclosed: Issue #449 opened on GitHub
- 2026-09-06: advisory: CVE-2026-86182 published

## References

- [https://github.com/diem-project/diem/](https://github.com/diem-project/diem/)
- [https://github.com/diem-project/diem/issues/449](https://github.com/diem-project/diem/issues/449)

## Related threats

- [Diem path traversal in code editor](https://junglewise.ai/threats/cve-2026-112138-a-flaw-has-been-found-in-diem-project-diem-up-to-5-1-3-the)
- [Diem CMF open redirect in sign-in authentication](https://junglewise.ai/threats/cve-2026-112040-a-vulnerability-was-determined-in-diem-project-diem-up-to)
- [Diem CMF unrestricted file upload in widget editor](https://junglewise.ai/threats/cve-2026-82679-diem-cmf-unrestricted-file-upload-in-widget-editor)
- [diem-project Diem OS command injection in Administrative Console](https://junglewise.ai/threats/cve-2026-82678-diem-project-diem-os-command-injection-in-administrative-console)