# CVE-2026-64815: JetBrains IntelliJ IDEA code injection in UI Designer

Source: https://junglewise.ai/threats/cve-2026-64815-jetbrains-intellij-idea-code-injection-in-ui-designer  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-23. Updated: 2026-07-23  
License: CC BY 4.0 with a link back

CVE-2026-64815 · Severity: high · CVSS 8.1 · Published 2026-07-23

JetBrains IntelliJ IDEA, a popular development environment used by software engineers, was vulnerable to a security flaw in its UI Designer component. An attacker could potentially execute unauthorized code on a developer's machine by providing a specially crafted form file. This could lead to a full system compromise, theft of source code, or unauthorized access to corporate development environments.

Technologies: [Jetbrains IntelliJ IDEA](https://junglewise.ai/threats/technologies/intellij-idea). Vendors: [Jetbrains](https://junglewise.ai/threats/vendors/jetbrains).

## Quick answers

**Is CVE-2026-64815 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-64815 being exploited in the wild.

**How severe is CVE-2026-64815?** High severity, with a CVSS score of 8.1, published 23 July 2026.

**Which products and versions are affected?** Jetbrains IntelliJ IDEA before 2026.2.

**Is there a fix for CVE-2026-64815?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-64815 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-64815?** Check whether you run Jetbrains IntelliJ IDEA at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A code injection vulnerability (CWE-94) exists in JetBrains IntelliJ IDEA's UI Designer component. The flaw stems from improper control of code generation when processing UI Designer form files (.form). An attacker can exploit this by providing a malicious form file that, when processed by the IDE, executes arbitrary commands. While the attack vector is listed as network-based, it typically requires a high complexity (AC:H) precondition, likely involving the victim opening or importing a malicious project or file. Successful exploitation allows for full remote code execution (RCE) with the privileges of the IDE user. The issue is resolved in version 2026.2.

## Affected products

- JetBrains IntelliJ IDEA before 2026.2

## Timeline

- 2026-07-23: disclosed
- 2026-07-23: advisory

## References

- [https://www.jetbrains.com/privacy-security/issues-fixed/](https://www.jetbrains.com/privacy-security/issues-fixed/)

## Related threats

- [JetBrains IntelliJ IDEA code execution via JVM options in Safe Mode](https://junglewise.ai/threats/cve-2026-123853-in-jetbrains-intellij-idea-before-2026-3-2026-2-2-code-execution)
- [JetBrains IntelliJ IDEA code execution via Terraform File Watchers](https://junglewise.ai/threats/cve-2026-123849-in-jetbrains-intellij-idea-before-2026-3-code-execution-was)
- [JetBrains IntelliJ IDEA TLS hostname verification missing](https://junglewise.ai/threats/cve-2026-123848-in-jetbrains-intellij-idea-before-2026-3-host-name-verification)
- [JetBrains IntelliJ IDEA command execution via control characters in terminal completion](https://junglewise.ai/threats/cve-2026-123847-in-jetbrains-intellij-idea-before-2026-3-command-execution-was)
- [JetBrains IntelliJ IDEA blind SSRF in JSON Schema validation](https://junglewise.ai/threats/cve-2026-123846-in-jetbrains-intellij-idea-before-2026-3-blind-ssrf-was-possible)