CVE-2026-46492

md-fileserver: Stored/Reflected XSS when viewing Markdown (raw HTML allowed)

State: Published
Severity: 7.2 High
Published: Jun 9, 2026
Updated: Jun 9, 2026
Reserved: May 14, 2026

Description

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 <script> 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.

Scores

CVSS	Score	Vector	Source
3.1	7.2 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N	GitHub_M

Weaknesses

CWE-80 Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
CWE-87 Improper Neutralization of Alternate XSS Syntax

Affected Products

Product	Versions
md-fileservercommenthol	< 1.10.3Affected

References

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