CVE-2026-9053

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.

Overview

State: PUBLISHED
Assigner (CNA): 9front
CVSS severity: MEDIUM
CVSS score: 6.9 / 10
CVSS vector: 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/AU:N/R:A/RE:L/U:Amber
Effective score: 6.9 / 10 MEDIUM source: CNA overview
CWE(s): —
Reserved: 2026-05-19
Published: 2026-05-22 02:57 UTC
Last updated: 2026-05-22 12:36 UTC
Source: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/9xxx/CVE-2026-9053.json
Linked Threat: CVE-2026-9053 — CVE-2026-9053

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published: 2026-05-22 04:16:28 UTC
NVD last modified: 2026-05-22 04:16:28 UTC

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID: EUVD-2026-31401
Assigner: 9front
Published: May 22, 2026, 2:57:35 AM
Updated: May 22, 2026, 12:36:11 PM
EUVD base score (CVSS 4.0): 6.9 / 10
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/AU:N/R:A/RE:L/U:Amber
EUVD-reported EPSS: 0.0600
Vendors: 9front
Products: 9front (f04e113279274526a8dae34de373027b68921fbf <d145acc9ef0da47131af6ad94e87264e04870d47)
Aliases: GHSA-38r3-cgcv-g3qp

ENISA 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.

EUVD references (1)

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

Affected products (1)

Vendor	Product	Versions	Platforms
9front	9front	`f04e113279274526a8dae34de373027b68921fbf` (affected)	x86, 32 bit, 64 bit

Vendor references (1)

References embedded in the original CVE record by the assigning CNA.

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

Web references (4)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

https://www.first.org/epss/ tenable:www.first.org
https://git.9front.org/plan9front/9front/d145acc9ef0da47131af6ad94e87264e04870d47/commit.html tenable:git.9front.org
https://nvd.nist.gov/vuln/detail/CVE-2026-9053 tenable:nvd.nist.gov
https://www.cve.org/CVERecord?id=CVE-2026-9053 tenable:www.cve.org

NVD-tagged references (1)

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

https://git.9front.org/plan9front/9front/d145acc9ef0da47131af6ad94e87264e04870d47/commit.html 1d66c9f9-fff2-411a-aa19-ca6312fa25e9

Remediations (10)

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

Addressing the Apache CVE-2026-9053 Vulnerability

web:bitninja.com

Understanding Apache CVE-2026-9053 Vulnerability The recent discovery of the Apache vulnerability identified as CVE-2026-9053 highlights a significant risk to server security. This issue involves default path disclosure in HTML file upload forms managed by the Mothra project. An attacker can exploit this vulnerability to submit a crafted request that conceals malicious default file paths.

2026-05-26 03:00 UTC
Security Advisory Bulletin 064 | Ubiquiti Community

web:community.ui.com

Published: May 21, 2026 Updated: May 22, 2026 Version: 1.1 Revision: 1.1 Summary 1 of 5 A malicious actor with access to the network and high privileges could exploit an Improper Input Validation vulnerability found in UniFi OS devices to execute a Command Injection. Affected Products: UniFi OS Server (Version 5.0.6 and earlier) Mitigation : Update your UniFi OS Server to Version 5.0.8 or later ...

2026-05-26 03:00 UTC
Microsoft Patch Tuesday March 2026 - 78 Vulnerabilities Fixed ...

web:cybersecuritynews.com

Microsoft released its March 2026 Patch Tuesday security update on March 10, 2026 , addressing 78 vulnerabilities across Windows, Microsoft Office, Azure, SQL Server, and .NET. The update includes one actively exploited zero-day vulnerability and multiple Critical-rated flaws demanding immediate attention from security teams. The most urgent fix this month is CVE - 2026 -21262, the sole zero-day ...

2026-05-26 03:00 UTC
Security Update Guide - Microsoft

web:portal.msrc.microsoft.com

The Security Update Guide provides information on the latest Microsoft security updates, helping users understand and address potential vulnerabilities effectively.

2026-05-26 03:00 UTC
Microsoft March 2026 Patch Tuesday fixes 2 zero-days, 79 flaws

web:www.bleepingcomputer.com

Today is Microsoft's March 2026 Patch Tuesday with security updates for 79 flaws, including 2 publicly disclosed zero-day vulnerabilities.

2026-05-26 03:00 UTC
Important MongoDB patch available - May 2026

web:www.mongodb.com

At MongoDB, the security of our users' data is our highest priority. As part of our proactive security program, we identified a vulnerability impacting the MongoDB Server and have patched deployments across the Atlas fleet; we have no evidence that this issue has been exploited at this time. For customers self-hosting MongoDB, patched builds are available for all supported versions 5.0 and ...

2026-05-26 03:00 UTC
Oracle Critical Patch Update Advisory - April 2026

web:www.oracle.com

This Critical Patch Update contains 481 new security patches across the product families listed below. Please note that an MOS note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at April 2026 Critical Patch Update: Executive Summary and Analysis.

2026-05-26 03:00 UTC
Patch Tuesday - March 2026 - Rapid7

web:www.rapid7.com

Microsoft is publishing 77 vulnerabilities this Patch Tuesday, including two publicly disclosed zero-day vulnerabilities.

2026-05-26 03:00 UTC
I tested Windows 11 March 2026 Updates: Everything new ... - Windows Latest

web:www.windowslatest.com

Windows 11 March 2026 Patch Tuesday update adds Emoji 16.0, Sysmon, network speed test, reliability improvements, and security fixes.

2026-05-26 03:00 UTC
Patch Tuesday May 2026: Security Updates & CVE Analysis

web:zecurit.com

Get the complete breakdown of Microsoft's May 2026 Patch Tuesday. We analyze the latest security updates and all critical CVEs .

2026-05-26 03:00 UTC

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-9053.json.

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