CVE-2026-9053

Medium

Description

Mothra would respect a default value given by a website for HTML file upload forms. An attacker could craft a website with a malicious default file path, and then conceal this form element.

SeverityMedium

CVSS6.9

Exploit probability—

Product9front

PublishedMay 22, 2026

First seenMay 22, 2026

Weakness typeCWE-434Unrestricted upload of dangerous file type

How to fix

Update

9front 9frontd145acc9ef0da47131af6ad94e87264e04870d47 or later

Vendor advisories

git.9front.org/plan9front/9front/d145acc9ef0da47131af6ad94e87264e04870d47/commit.html

Affected products

Product	Affected versions	Fixed in
9front 9front	f04e113279274526a8dae34de373027b68921fbf ≤ v < d145acc9ef0da47131af6ad94e87264e04870d47	d145acc9ef0da47131af6ad94e87264e04870d47

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