Improper URL Validation in JetBrains YouTrack Application
CVE-2026-123323

8.4HIGH

Key Information:

Vendor

Jetbrains
Status
Youtrack
Vendor
CVE Published:
6 November 2026

What is CVE-2026-123323?

JetBrains YouTrack versions before 2025.3.170763, 2026.1.14150, and 2026.2.19656 are susceptible to improper URL validation in the application widget host. This flaw could allow unauthorized apps to send REST requests without requiring user confirmation, potentially leading to security breaches. Users of affected versions should upgrade to the latest version to prevent exploitation and enhance security.

Affected Version(s)

YouTrack 0 < 2025.3.170763, 2026.1.14150, 2026.2.19656

References

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

CVSS V3.1

Score:
8.4
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
Required
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.