CVE-2026-123844 in IntelliJ IDEA

Summary

by MITRE • 11/06/2026

In JetBrains IntelliJ IDEA before 2026.3 sSRF was possible via custom plugin repositories

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

• Responsible: JetBrains
• Reservation: 11/06/2026
• Disclosure: 11/06/2026
• Moderation: accepted
• Entry: VDB-431997
• CPE: 20261106
• CWE: CWE-918 (confirmed)
• CVSS: 5.3 (CNA)
• EPSS: 0.00000
• KEV: no
• Activities: very low

Sources

• MITRE: https://www.cve.org/CVERecord?id=CVE-2026-123844
• NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-123844
• CVE Details: https://www.cvedetails.com/cve/CVE-2026-123844/