CVE-2026-123840
In JetBrains IntelliJ IDEA before 2026.3 hTML injection was possible in Remote Development editor...
In JetBrains IntelliJ IDEA before 2026.3 hTML injection was possible in Remote Development editor tabs
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
In JetBrains IntelliJ IDEA before 2026.3 hTML injection was possible in Remote Development editor tabs
- Record
CVE-2026-123840- CVSS 3.1
- 4.7 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N - Weakness
- CWE-80
- Updated
- 2026-11-06
EUVDEUVD-2026-118343
In JetBrains IntelliJ IDEA before 2026.3 hTML injection was possible in Remote Development editor tabs
- Record
EUVD-2026-118343- CVSS 3.1
- 4.7 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N - Updated
- 2026-11-06
GitHub AdvisoriesGHSA-cw9v-29r9-xhg4
In JetBrains IntelliJ IDEA before 2026.3 hTML injection was possible in Remote Development editor...
In JetBrains IntelliJ IDEA before 2026.3 hTML injection was possible in Remote Development editor tabs
- Record
GHSA-cw9v-29r9-xhg4- CVSS 3.1
- 4.7 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N - Weakness
- CWE-80
- Updated
- 2026-11-06
NVD
In JetBrains IntelliJ IDEA before 2026.3 hTML injection was possible in Remote Development editor tabs
- Record
CVE-2026-123840- CVSS 3.1
- 4.7 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N - Weakness
- CWE-80
- Updated
- 2026-11-06
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| published | CVE List, EUVD | |
| published | EUVD, NVD | |
| aliases, references, title | GitHub Advisories | |
| cwes, severity | CVE List | |
| first indexed | EUVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-123840 is a medium vulnerability (CVSS 4.7) in Jetbrains Intellij Idea, published November 6, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.20%, the 9th percentile. No source names a fixed version.