Is CVE-2026-15505 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-15505 being exploited in the wild.

How severe is CVE-2026-15505?

Low severity, with a CVSS score of 3.5, published 12 July 2026.

Is there a fix for CVE-2026-15505?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-15505 attacked?

It is attacked over the network, in a network appliance.

Am I affected by CVE-2026-15505?

Check whether you run Vnotex vNote at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-15505: vnotex vNote cross-site scripting in YAML Frontmatter

CVE-2026-15505 · Severity: low · CVSS 3.5 · Published 2026-07-12

vNote is a note-taking application designed for Markdown editing. A security vulnerability in the way it handles document metadata (YAML Frontmatter) could allow an attacker to execute malicious scripts when a user views a specially crafted note. This could lead to unauthorized actions being performed within the application context on behalf of the user.

Technologies: Vnotex vNote. Vendors: Vnotex.

Quick answers

Is CVE-2026-15505 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-15505 being exploited in the wild.
How severe is CVE-2026-15505?: Low severity, with a CVSS score of 3.5, published 12 July 2026.
Which products and versions are affected?: Vnotex vNote up to 3.20.1.
Is there a fix for CVE-2026-15505?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-15505 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-15505?: Check whether you run Vnotex vNote at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A cross-site scripting (XSS) vulnerability exists in vnotex vNote versions up to 3.20.1. The flaw is located within the YAML Frontmatter component, specifically in the handling of the 'p_metaData' argument in the '/src/data/extra/web/js/markdownit.js' file. A remote attacker can exploit this by providing malicious input that is subsequently executed in the victim's browser context. The attack requires low privileges and some user interaction (viewing the malicious content). As of the disclosure date, the vendor has not responded to reports of this vulnerability.

Affected products

vnotex vNote up to 3.20.1

Timeline

2026-07-12: disclosed
2026-07-12: advisory

References

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