Arbitrary file upload in Plank Laravel-Mediable

CVE-2026-4809

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.

Vulnerability class: Unrestricted File Upload

Published · last modified .

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.011 (65.4th percentile), scored .

Low probability of exploitation in the next 30 days, but still tracked. 65th percentile — 65.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-4809: held from 0.009 to 0.011.

EPSS over last 30 days · oldest: 0.009 · newest: 0.011 · change: +0.003

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-4809?
CVE-2026-4809 is a critical-severity vulnerability in Plank Laravel-Mediable, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2026-03-26.
How severe is CVE-2026-4809?
Critical severity. CVSS v3 base score is 9.8 out of 10.