Quick answers
- Is CVE-2026-82679 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-82679 being exploited in the wild.
- How severe is CVE-2026-82679?
- Medium severity, with a CVSS score of 6.3, published 31 August 2026.
- Which products and versions are affected?
- Diem-Project Diem up to 5.1.3.
- Is there a fix for CVE-2026-82679?
- 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-2026-82679 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-82679?
- 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 an unrestricted file upload flaw in the widget media form component (dmFrontPlugin/lib/dmWidget/media/dmWidgetContentBaseMediaForm.php). The vulnerable code uses sfValidatorFile without enforcing a file-type allowlist and uploads files to /uploads/widget/ with their original extensions intact. An authenticated attacker with widget_edit privileges can craft a multipart form submission to POST /index.php/+/dmWidget/edit to upload a PHP file. The file is stored in a web-accessible directory and executed by the PHP interpreter, resulting in remote code execution. The root cause is the absence of file-type validation, content inspection, or a non-executable storage policy. No patch has been released by the project maintainers.
Affected products
- diem-project Diem up to 5.1.3
Timeline
- 2026-07-17: disclosed: Issue reported on GitHub
- 2026-08-31: advisory: CVE published