---
title: "CVE-2026-103493: JetBrains YouTrack - Stored XSS"
description: "JetBrains YouTrack < 2026.2.19422 contains a stored XSS caused by improper sanitization of Mermaid and LaTeX content, letting attackers execute scripts in users' browsers, exploit requires content submission."
url: https://panop.io/threat-heartbeat/CVE-2026-103493/
---

# CVE-2026-103493 JetBrains YouTrack - Stored XSS

JetBrains YouTrack < 2026.2.19422 contains a stored XSS caused by improper sanitization of Mermaid and LaTeX content, letting attackers execute scripts in users' browsers, exploit requires content submission.

CVSS base score 8.1 /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-2026-103493)

## Details

Type

Stored XSS

Impact

Stored XSS

CVSS vector

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

Published

1 October 2026

Updated

15 October 2026

Weakness

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

## Vendor fix

Update to version 2026.2.19422 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-2026-103493](https://nvd.nist.gov/vuln/detail/CVE-2026-103493)
- [https://www.jetbrains.com/privacy-security/issues-fixed/](https://www.jetbrains.com/privacy-security/issues-fixed/)

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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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