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

Quick assessment

Affected
plank laravel-mediable
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Laravel-Mediable是Plank开源的一个Laravel媒体文件管理包。 laravel-mediable 6.4.0及之前版本存在安全漏洞，该漏洞源于应用程序在使用该包处理文件上传时接受或偏好客户端提供的MIME类型，可能导致上传包含可执行PHP代码的文件，进而导致远程代码执行。

CVSS 9.8 · Critical EPSS 0.87% · P56

Affected Version Matrix 1

VendorProduct Version RangeStatus
plank laravel-mediable <= 6.4.0 affected
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I. Basic Information for CVE-2026-4809

Vulnerability Information
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Vulnerability Title
Unsafe Client MIME Type Handling Can Enable Arbitrary File Upload in plank/laravel-mediable
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
危险类型文件的不加限制上传
Source: CVE Program / CVE List V5
Vulnerability Title
Laravel-Mediable 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Laravel-Mediable是Plank开源的一个Laravel媒体文件管理包。 laravel-mediable 6.4.0及之前版本存在安全漏洞，该漏洞源于应用程序在使用该包处理文件上传时接受或偏好客户端提供的MIME类型，可能导致上传包含可执行PHP代码的文件，进而导致远程代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
plank laravel-mediable <= 6.4.0 -

II. Public POCs for CVE-2026-4809

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 7479 chars
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III. Intelligence Information for CVE-2026-4809

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Vendor Pages for CVE-2026-4809 (1)

Other References for CVE-2026-4809 (1)

IV. Related Vulnerabilities

Same product: laravel-mediable
Same vendor: plank
Same weakness: CWE-434

V. Comments for CVE-2026-4809

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