CVE-2026-103489
Received Received - Intake

HTML Injection in JetBrains YouTrack via VCS Notifications

Publication date: 2026-10-01

Last updated on: 2026-10-01

Assigner: JetBrains s.r.o.

Description
In JetBrains YouTrack before 2026.2.19422 hTML injection in VCS command failure notifications was possible

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published
2026-10-01
Last Modified
2026-10-01
Generated
2026-10-01
AI Q&A
2026-10-01
EPSS Evaluated
N/A
NVD
CVE-2026-103489
EUVD
EUVD-2026-90580

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
jetbrains youtrack to 2026.2.19422 (exc)

Helpful Resources

Exploitability

CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

Attack-Flow Graph

AI Quick Actions

Instant insights powered by AI
Executive Summary

This vulnerability is a HTML injection issue in JetBrains YouTrack before version 2026.2.19422. It occurs in VCS command failure notifications, where malicious HTML code could be injected and potentially executed.

Detection Guidance

This vulnerability involves HTML injection in VCS command failure notifications in JetBrains YouTrack. To detect it, monitor YouTrack logs for unusual HTML content in error notifications or failed VCS command outputs. Check for unexpected script tags or injected content in notification messages.

Impact Analysis

The impact is limited due to a low CVSS score of 2.0. It requires user interaction (UI:R) and high privileges (PR:H) to exploit. The main risk is unauthorized modification of displayed content via injected HTML in failure notifications.

Compliance Impact

The vulnerability involves HTML injection in VCS command failure notifications in JetBrains YouTrack before 2026.2.19422. This could potentially allow attackers to inject malicious scripts or manipulate notifications, which may lead to unauthorized data access or disclosure. Such risks could impact compliance with GDPR (data protection) and HIPAA (health data security) by compromising confidentiality and integrity of sensitive information.

Mitigation Strategies

Update JetBrains YouTrack to version 2026.2.19422 or later to address the HTML injection vulnerability in VCS command failure notifications.

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-103489. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart