Cyber Resilience

CVE-2026-64815

RCE in Jetbrains Intellij Idea ≤ 2026.2

RCE
Published
23 July 2026
Modified
28 July 2026
Patch / advisory
View advisory
CVSS Score v3.1 8.1
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.0033 26th percentile
Risk Priority 55 floored blend · peak EPSS

Summary

CVE-2026-64815 is a high-severity Code Injection (CWE-94) vulnerability in Jetbrains Intellij Idea. Its CVSS base score is 8.1 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Client Execution (T1203); ranked at the 26th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified map to SI-10 (Information Input Validation) and CM-7 (Least Functionality) — see the control section below for these in your framework.

OWASP Top 10 for Web (2025)

A05:2025 Injection

EU & UK References

Vulnerability Data

In JetBrains IntelliJ IDEA before 2026.2 arbitrary code injection was possible via UI Designer form files

CWE(s)
CWE-94

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1203 Exploitation for Client Execution Execution
Adversaries may exploit software vulnerabilities in client applications to execute code.
attack.mitre.org →
T1204.002 Malicious File Execution
An adversary may rely upon a user opening a malicious file in order to gain execution.
attack.mitre.org →
Why these techniques?

CWE-94 code injection via UI Designer form files directly enables client-side arbitrary code execution when a malicious file is opened in the IDE (T1203, T1204.002).

Confidence: HIGH · MITRE ATT&CK Enterprise v19.0

Likely ATT&CK TechniquesAI

Techniques this vulnerability likely enables, inferred from its description, weakness type, and attributed-actor tradecraft. Confidence is per-technique.

T1203 Exploitation for Client Execution Executionconfidence: HIGH
Arbitrary code injection via form files directly enables exploitation of the client IDE for code execution.
attack.mitre.org →
inferred from description + CWE · MITRE ATT&CK Enterprise v19.0

CVEs Like This One

CVE-2026-49383Same product: Jetbrains Intellij Idea
CVE-2026-49366Same product: Jetbrains Intellij Idea
CVE-2025-57727Same product: Jetbrains Intellij Idea
CVE-2025-57730Same product: Jetbrains Intellij Idea
CVE-2025-32054Same product: Jetbrains Intellij Idea
CVE-2026-41882Same product: Jetbrains Intellij Idea
CVE-2026-49367Same product: Jetbrains Intellij Idea
CVE-2026-49382Same product: Jetbrains Intellij Idea
CVE-2023-39261Same product: Jetbrains Intellij Idea
CVE-2025-57728Same product: Jetbrains Intellij Idea

Affected Assets

jetbrains
intellij idea
≤ 2026.2

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)
  • SI-10 Information Input Validation
  • SI-3 Malicious Code Protection
  • CM-7 Least Functionality
Detect
Catch it (NIST detect / respond)
  • SI-3 Malicious Code Protection
Harden
Shrink the surface (DISA STIG)

—

Validate
Prove the fix (OWASP ASVS)
  • V1.3.1

Mitigating Controls (NIST 800-53 r5) AI

SI-10 Information Input Validation good match
prevent

Directly enforces validation of UI Designer form file contents to block generation/execution of injected code (CWE-94).

SI-3 Malicious Code Protection partial match
preventdetect

Malicious-code protection mechanisms can inspect or sandbox form files before the IDE processes them for code injection.

CM-7 Least Functionality partial match
prevent

Disables or restricts the UI Designer feature (least functionality) so that malicious form files cannot be loaded or executed.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 mostly match
prevents

PR.PS-06's SDLC practices directly target injection flaws via secure coding and testing (mostly), yet as a single broad outcome it leaves many code-generation specifics unaddressed (partial).

PR.DS-10 none match
prevents

PR.DS-10 protects runtime data confidentiality/integrity but has no bearing on neutralizing externally influenced input during code generation, so neither direction shows any preventive effect.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.28 Secure coding partial match
prevents

Banning unapproved code samples and unauthenticated web services, combined with secure-coding standards and SAST, prevents the dynamic generation or inclusion of attacker-supplied code.

A.8.7 Protection against malware none match
none

Controls that restrict unauthorized or malicious code from being introduced via external networks or removable media limit opportunities for an attacker to inject and execute arbitrary code.

References