Detections
Analytics

JetBrains IntelliJ IDEA < 2026.3 Multiple Vulnerabilities

high Nessus Plugin ID 379546

Synopsis

The integrated development environment installed on the remote host is affected by multiple vulnerabilities.

Description

The version of JetBrains IntelliJ IDEA installed on the remote host is prior to 2026.3. It is, therefore, affected by multiple vulnerabilities:

 - In JetBrains IntelliJ IDEA before 2026.3 DOM-based XSS in the OpenAPI preview error view was possible.
 (CVE-2026-123301)

 - In JetBrains IntelliJ IDEA before 2026.3 path traversal was possible via unpacking Dev Container archives from a remote host. (CVE-2026-123305)

 - In JetBrains IntelliJ IDEA before 2026.3 code execution in untrusted projects via a configured ShellCheck path was possible. (CVE-2026-123304)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Upgrade to JetBrains IntelliJ IDEA version 2026.3 or later.

See Also

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

Plugin Details

Severity: High

ID: 379546

File Name: jetbrains_intellij_idea_2026_3.nasl

Version: 1.1

Type: Local

Agent: windows, macosx, unix

Family: Misc.

Published: 11/12/2026

Updated: 11/12/2026

Configuration: Enable thorough checks (optional)

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.52

CVSS v2

Risk Factor: High

Base Score: 8.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:P/A:N

CVSS Score Source: CVE-2026-123301

CVSS v3

Risk Factor: High

Base Score: 8.2

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N

Vulnerability Information

CPE: cpe:/a:jetbrains:intellij_idea

Required KB Items: installed_sw/JetBrains IntelliJ IDEA

Patch Publication Date: 10/5/2026

Vulnerability Publication Date: 11/6/2026

Reference Information

CVE: CVE-2026-123278, CVE-2026-123301, CVE-2026-123304, CVE-2026-123305, CVE-2026-123306, CVE-2026-123308, CVE-2026-123310, CVE-2026-123313, CVE-2026-123838, CVE-2026-123841, CVE-2026-123842, CVE-2026-123846, CVE-2026-123847, CVE-2026-123849