CVE-2026-100275

In JetBrains YouTrack before 2026.2.19197 stored XSS in the workflow error notification toast was possible

• Published Sep 30, 2026
• CVSS 4.8 medium
• 0.2% chance of exploitation in the next 30 days (EPSS)
• A fix is available

CVE-2026-100275 at the National Vulnerability Database