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CVE-2026-64805 JetBrains CVE debrief

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-07-23T12:18:35.993Z and has not been modified since then. CVE-2026-64805 is a high severity vulnerability in JetBrains WebStorm, allowing for arbitrary code execution before granting project trust via project-local package-manager tooling. The vulnerability has a CVSS score of 8.4 and affects WebStorm versions prior to 2026.2. Users of affected versions should prioritize patching or mitigating this vulnerability. Evidence from NVD and CVE.org indicates potential for arbitrary code execution in JetBrains WebStorm before 2026.2 via project-local package-manager tooling. Users should verify WebStorm versions, review vendor advisories, and monitor project-local package-manager tooling for suspicious activity. The debrief provides an executive overview covering the affected product, vulnerability class, likely operational impact, and source-confidence limits.

Vendor
JetBrains
Product
WebStorm
CVSS
HIGH 8.4
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-23
Original CVE updated
2026-07-28
Advisory published
2026-07-23
Advisory updated
2026-07-28

Who should care

Users of JetBrains WebStorm, especially those using versions prior to 2026.2, should be aware of this vulnerability and take steps to mitigate it. This includes verifying WebStorm versions, applying vendor patches or upgrades, and monitoring project-local package-manager tooling for suspicious activity. Security teams and operators should review project trust settings and consider compensating controls.

Technical summary

CVE-2026-64805 is a high severity vulnerability in JetBrains WebStorm, allowing for arbitrary code execution before granting project trust via project-local package-manager tooling. The vulnerability has a CVSS score of 8.4 and affects WebStorm versions prior to 2026.2. Users of affected versions should prioritize patching or mitigating this vulnerability.

Defensive priority

High priority due to CVSS score of 8.4 and potential for arbitrary code execution.

Recommended defensive actions

  • Inventory and verify WebStorm versions prior to 2026.2
  • Apply vendor patch or upgrade to WebStorm 2026.2 or later
  • Monitor project-local package-manager tooling for suspicious activity
  • Consider compensating controls such as WebStorm project trust settings
  • Review relevant monitoring, detection, and logs for exposed assets that need extra review

Evidence notes

Evidence from NVD and CVE.org indicates potential for arbitrary code execution in JetBrains WebStorm before 2026.2 via project-local package-manager tooling. The vulnerability has a CVSS score of 8.4 and affects WebStorm versions prior to 2026.2. Users should verify WebStorm versions, review vendor advisories, and monitor project-local package-manager tooling for suspicious activity. Evidence limits suggest verifying project trust settings and package-manager tooling configurations.

Official resources

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-07-23T12:18:35.993Z and has not been modified since then.