CVE-2026-123840

EUVD-2026-118343
In JetBrains IntelliJ IDEA before 2026.3 hTML injection was possible in Remote Development editor tabs
Basic XSS
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
JetBrainsCNA
4.7 MEDIUM
NETWORK
HIGH
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources (CNA/ADP records, vendor advisories, Enginsight analysis).
VendorProductVersionSource
jetbrainsintellij_idea
𝑥
< 2026.3
CNA
Common Weakness Enumeration
References
https://www.jetbrains.com/privacy-security/issues-fixed/