Quick answers
- Is CVE-2026-64804 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-64804 being exploited in the wild.
- How severe is CVE-2026-64804?
- High severity, with a CVSS score of 8.4, published 23 July 2026.
- Which products and versions are affected?
- Jetbrains WebStorm before 2026.2.
- Is there a fix for CVE-2026-64804?
- A patch was published on 2026-07-23: Fixed in version 2026.2 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-64804 attacked?
- It is attacked with local access, in a network appliance.
- Am I affected by CVE-2026-64804?
- Check whether you run Jetbrains WebStorm 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 vulnerability in JetBrains WebStorm (classified as CWE-829: Inclusion of Functionality from Untrusted Control Sphere) allowed for arbitrary code execution when opening a project. The flaw exists in how the IDE handles project-local linter tooling, which could be triggered automatically before the user grants 'Project Trust.' An attacker could exploit this by placing malicious scripts or binaries within a project's local configuration that the IDE executes upon initialization. This is a local attack vector with high impact on confidentiality, integrity, and availability. The issue is resolved in WebStorm version 2026.2.
Affected products
- JetBrains WebStorm before 2026.2
Timeline
- 2026-07-23: advisory: CVE-2026-64804 published by JetBrains
- 2026-07-23: patched: Fixed in version 2026.2