CVE-2026-61457

High

Description

The Grav API plugin (getgrav/grav-plugin-api) before 1.0.3 contains a file upload extension bypass in the API media controller. HandlesMediaUploads::validateFileExtension() inspects only the final file extension via pathinfo($filename, PATHINFO_EXTENSION), so a user with api.media.write permission can upload a file with a double extension such as shell.php.jpg to bypass the dangerous extensions blocklist. The web server may then execute the file as PHP, resulting in remote code execution.

SeverityHigh

CVSS8.8

Exploit probability—

Product

Grav

PublishedJul 15, 2026

First seenJul 15, 2026

Weakness typeCWE-434Unrestricted upload of dangerous file type

How to fix

Update

getgrav grav1.0.3 or later

Vendor advisories

github.com/getgrav/grav/security/advisories/GHSA-66v2-vxxf-xc3v

Affected products

Product	Affected versions	Fixed in
getgrav grav	v < 1.0.3	1.0.3

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