---
title: "CVE-2026-86016: VNote - Stored XSS"
description: "VNote < 4.3.0 contains a stored XSS caused by unsafe assignment of YAML frontmatter metadata to innerHTML in markdownit.js, letting attackers execute JavaScript and read local files remotely, exploit requires opening a crafted Markdown note."
url: https://panop.io/threat-heartbeat/CVE-2026-86016/
---

# CVE-2026-86016 VNote - Stored XSS

VNote < 4.3.0 contains a stored XSS caused by unsafe assignment of YAML frontmatter metadata to innerHTML in markdownit.js, letting attackers execute JavaScript and read local files remotely, exploit requires opening a crafted Markdown note.

CVSS base score 8.2 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.22% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-86016)

## Details

Type

Stored XSS

Impact

Information Disclosure, Stored XSS

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N

Published

13 October 2026

Updated

15 October 2026

Weakness

[CWE-79](https://cwe.mitre.org/data/definitions/79.html)

## Vendor fix

Update to version 4.3.0 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-86016](https://nvd.nist.gov/vuln/detail/CVE-2026-86016)
- [https://github.com/vnotex/vnote/commit/7371efde531312eb24beb982fb5fdd73469cb171](https://github.com/vnotex/vnote/commit/7371efde531312eb24beb982fb5fdd73469cb171)
- [https://github.com/vnotex/vnote/releases/tag/v4.3.0](https://github.com/vnotex/vnote/releases/tag/v4.3.0)
- [https://github.com/vnotex/vnote/security/advisories/GHSA-vfhj-c636-h59x](https://github.com/vnotex/vnote/security/advisories/GHSA-vfhj-c636-h59x)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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