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TI-2026-34191 Aliases CVE-2026-46492GHSA-32q2-hhr5-6qvv

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

Priority HIGH 71CWE-80Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-80.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00232 14th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed md-fileserver (commenthol): 1.10.3md-fileserver (npm): 1.10.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
commentholmd-fileserverbefore 1.10.31.10.3Patch availableCNA
—md-fileserver (npm)before 1.10.31.10.3Patch availableGHSA-32q2-hhr5-6qvv
  • md-fileserver Vendorcommenthol Affected before 1.10.3 Fixed in 1.10.3 Patch available CNA
  • md-fileserver (npm) Vendor— Affected before 1.10.3 Fixed in 1.10.3 Patch available GHSA-32q2-hhr5-6qvv

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:commenthol:md-fileserver:*:*:*:*:*:node.js:*:*before 1.10.3Vulnerablecommenthol
  • cpe:2.3:a:commenthol:md-fileserver:*:*:*:*:*:node.js:*:* Versions before 1.10.3 Vulnerable ·commenthol

Remediation

  • Fix · CNA md-fileserver (commenthol) Fixed in 1.10.3
  • Fix · GHSA-32q2-hhr5-6qvv md-fileserver (npm) Fixed in 1.10.3 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-46492
  2. 2026-10-03 Alias added: GHSA-32q2-hhr5-6qvv

References

Exploit 1

Advisory 1

Other 2

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences