CVE-2026-9053

MEDIUM

9front - Arbitrary File Overwrite via HTML File Upload Form Default Path

Title source: llm

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.

References (1)

Core 1

Core References

Mitigation mitigation

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

Scores

CVSS v4 6.9

EPSS 0.0028

EPSS Percentile 19.1%

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:N/R:A/V:X/RE:L/U:Amber

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-434

Status published

Products (1)

9front/9front f04e113279274526a8dae34de373027b68921fbf - d145acc9ef0da47131af6ad94e87264e04870d47

Published May 22, 2026

Tracked Since May 22, 2026