Vulnerability · Published Mar 26, 2026 · Assigned by TuranSec

CVE-2026-4809Unsafe Client MIME Type Handling Can Enable Arbitrary File Upload in plank/laravel-mediable

Critical 9.8

In plain English

A critical-severity unrestricted file upload in laravel-mediable from plank. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 59% of all known vulnerabilities).

Severity (CVSS 3.1)9.8Critical

Exploit odds (30 days)0.9%top 40.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

plank/laravel-mediable through version 6.4.0 can allow upload of a dangerous file type when an application using the package accepts or prefers a client-supplied MIME type during file upload handling. In that configuration, a remote attacker can submit a file containing executable PHP code while declaring a benign image MIME type, resulting in arbitrary file upload.

Affected products (as reported)

Vendor	Product	Versions
plank	laravel-mediable	<= 6.4.0

Weakness: CWE-434 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Project repository third-party-advisory
Release 6.4.0 third-party-advisory