Is CVE-2026-4809 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-4809 being exploited in the wild.

How severe is CVE-2026-4809?

Critical severity, with a CVSS score of 9.8, published 26 March 2026.

Is there a fix for CVE-2026-4809?

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-2026-4809 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-4809?

Check whether you run Plank Mediable 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.

CVE-2026-4809: Plank laravel-mediable arbitrary file upload in file handling

CVE-2026-4809 · Severity: critical · CVSS 9.8 · Published 2026-03-26

A security vulnerability in the Laravel-Mediable library allows attackers to upload malicious files to a web server. This library is used by developers to manage file uploads and attachments in Laravel applications. By disguising executable code as a harmless image, an attacker could potentially take full control of the server, leading to data theft or service disruption.

Technologies: Plank Mediable. Vendors: Plank.

Quick answers

Is CVE-2026-4809 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-4809 being exploited in the wild.
How severe is CVE-2026-4809?: Critical severity, with a CVSS score of 9.8, published 26 March 2026.
Which products and versions are affected?: Plank Mediable Through 6.4.0.
Is there a fix for CVE-2026-4809?: 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-2026-4809 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-4809?: Check whether you run Plank Mediable 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

A vulnerability classified as CWE-434 (Unrestricted Upload of File with Dangerous Type) exists in plank/laravel-mediable through version 6.4.0. The issue arises when an application is configured to trust or prefer client-supplied MIME types during file upload handling. A remote, unauthenticated attacker can exploit this by submitting a file containing PHP code while declaring a benign MIME type (such as image/jpeg). If the application stores these files in a web-accessible directory without proper server-side validation or execution prevention, the attacker can achieve remote code execution (RCE). As of the advisory date, no patch is available.

Affected products

Plank laravel-mediable Through 6.4.0

Timeline

2026-03-26: advisory: NVD publication date
2026-03-26: disclosed: Vulnerability reported by TuranSec

References

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