What is CVE-2026-64805?

CVE-2026-64805 is a high-severity vulnerability in Jetbrains Webstorm, classified under Inclusion of Functionality from Untrusted Control Sphere. CVSS score: 8.4/10. Published 2026-07-23.

How severe is CVE-2026-64805?

High severity. CVSS v3 base score is 8.4 out of 10.

Vulnerability in Jetbrains Webstorm

CVE-2026-64805

In JetBrains WebStorm before 2026.2 arbitrary code execution was possible before granting project trust via project-local package-manager tooling

Published 2026-07-23 · last modified 2026-07-28.

CVSS v3 metric

CVSS v3 base score 8.4 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.002 (8.4th percentile), scored 2026-10-22.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 8th percentile — 8.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

Jetbrains Webstorm — versions 0

Weakness classification (CWE)

CWE-829 — Inclusion of Functionality from Untrusted Control Sphere

References

www.jetbrains.com/privacy-security/issues-fixed/ (Vendor Advisory)

Frequently asked questions

What is CVE-2026-64805?: CVE-2026-64805 is a high-severity vulnerability in Jetbrains Webstorm, classified under Inclusion of Functionality from Untrusted Control Sphere. CVSS score: 8.4/10. Published 2026-07-23.
How severe is CVE-2026-64805?: High severity. CVSS v3 base score is 8.4 out of 10.