Arbitrary file upload in 9front

CVE-2026-9053

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.

Vulnerability class: Unrestricted File Upload

Published · last modified .

EPSS exploit prediction

EPSS: 0.004 (34.6th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 35th percentile — 34.6% 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-2026-9053: held from 0.003 to 0.004.

EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.002

Affected products

  • 9front — versions f04e113279274526a8dae34de373027b68921fbf

Weakness classification (CWE)

References