CVE-2026-49382 JetBrains CVE debrief

Who should care

Organizations and developers using JetBrains IntelliJ IDEA, particularly those utilizing the Copyright plugin with custom templates. Development teams in regulated industries with strict code provenance requirements should prioritize patching due to potential supply chain implications if malicious templates were distributed.

Technical summary

The Copyright plugin in JetBrains IntelliJ IDEA versions prior to 2026.1 contains a template injection vulnerability (CWE-1336) that can lead to code execution. The vulnerability stems from improper neutralization of special elements in template expressions used by the plugin. Exploitation requires user interaction and high attack complexity, limiting practical exploitability. The attack vector is local, meaning an attacker would need to leverage local access or social engineering to deliver a malicious payload. JetBrains has patched this vulnerability in version 2026.1.

Defensive priority

medium

Recommended defensive actions

• Upgrade JetBrains IntelliJ IDEA to version 2026.1 or later to remediate the template injection vulnerability in the Copyright plugin
• Review and audit custom copyright templates in use prior to upgrading, as these may contain or trigger the vulnerable code path
• For environments where immediate upgrading is not feasible, restrict access to IntelliJ IDEA configurations and avoid opening untrusted projects that may contain malicious copyright templates
• Monitor JetBrains security advisories for additional guidance or patches that may be released for older supported versions
• Consider implementing application control policies to prevent execution of untrusted code within the IDE environment

Evidence notes

The vulnerability affects IntelliJ IDEA versions prior to 2026.1. The CVSS vector (CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L) indicates local attack vector, high complexity, no privileges required, user interaction needed, with low impacts across confidentiality, integrity, and availability. The weakness is identified as CWE-1336 (template injection).

Official resources