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 ↗

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

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

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