What’s Vulnerable › Vulnerabilities

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

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-03-26 · updated 2026-08-10
• Weakness: CWE-434

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

• plank laravel-mediable: through 6.4.0

References

• https://github.com/plank/laravel-mediable
• https://github.com/plank/laravel-mediable/releases/tag/6.4.0

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