Stored XSS Vulnerability in JetBrains YouTrack
CVE-2026-103493

8.1HIGH

Key Information:

Vendor

Jetbrains
Status
Youtrack
Vendor
CVE Published:
1 October 2026

What is CVE-2026-103493?

JetBrains YouTrack prior to version 2026.2.19422 is vulnerable to a stored Cross-Site Scripting (XSS) attack. This vulnerability allows attackers to inject malicious scripts into Mermaid and LaTeX content, which can then be executed by users accessing the affected content. This poses significant security risks as it may lead to unauthorized data access or execution of harmful actions on behalf of unsuspecting users.

Affected Version(s)

YouTrack 0 < 2026.2.19422

References

https://www.jetbrains.com/privacy-security/issues-fixed/

CVSS V3.1

Score:
8.1
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.