DOM-based XSS Vulnerability in JetBrains IntelliJ IDEA
CVE-2026-123301

8.2HIGH

Key Information:

Vendor

Jetbrains
Status
Intellij Idea
Vendor
CVE Published:
6 November 2026

What is CVE-2026-123301?

A DOM-based Cross-Site Scripting (XSS) vulnerability has been identified in JetBrains IntelliJ IDEA prior to version 2026.3. This security flaw allows attackers to execute malicious scripts within the OpenAPI preview error view. Such vulnerabilities can lead to unauthorized access and potentially compromise user data. Users are advised to update to the latest version to mitigate the risk associated with this issue.

Affected Version(s)

IntelliJ IDEA 0 < 2026.3

References

https://www.jetbrains.com/privacy-security/issues-fixed/

CVSS V3.1

Score:
8.2
Severity:
HIGH
Confidentiality:
High
Integrity:
Low
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.