commenthol md-fileserver up to 1.10.2 cross site scripting

Summaryinfo

A vulnerability has been found in commenthol md-fileserver up to 1.10.2 and classified as problematic. This issue affects some unknown processing. This manipulation causes cross site scripting. This vulnerability is tracked as CVE-2026-46492. The attack is possible to be carried out remotely. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability has been found in commenthol md-fileserver up to 1.10.2 and classified as problematic. Affected by this vulnerability is an unknown part. The manipulation with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is CWE-80. The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes special characters such as "<", ">", and "&" that could be interpreted as web-scripting elements when they are sent to a downstream component that processes web pages. As an impact it is known to affect integrity. The summary by CVE is:

md-fileserver allows for local viewing of markdown files in a browser. Prior to version 1.10.3, a cross-site scripting (XSS) vulnerability exists in the application’s Markdown rendering logic. When user-supplied Markdown content is rendered, embedded raw HTML—including tags—is processed and injected into the resulting page without sanitization, allowing arbitrary JavaScript execution in the context of the affected domain. This issue has been patched in version 1.10.3.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-46492 since 05/14/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

Upgrading to version 1.10.3 eliminates this vulnerability. The upgrade is hosted for download at github.com.

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Productinfo

Vendor

• commenthol

Name

• md-fileserver

Version

• 1.10.0
• 1.10.1
• 1.10.2

Website

• Product: https://github.com/commenthol/md-fileserver/

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