CVE-2026-100259

In JetBrains YouTrack before 2026.2.18991 improper access control on Gantt chart allowed edits by users with view-only access

  • Published Sep 30, 2026
  • CVSS 4.3 medium
  • 0.2% chance of exploitation in the next 30 days (EPSS)
  • A fix is available

Affected software

CVE-2026-100259 at the National Vulnerability Database