[NEW] [high] JetBrains WebStorm: Multiple vulnerabilities allow code execution

highCVE-2026-64804 CVE-2026-64805 CVE-2026-64806 CVE-2026-64807

A local attacker can exploit multiple vulnerabilities in JetBrains WebStorm to execute arbitrary program code.

CSIRTS triage

vendor: JetBrains product: WebStorm Remote code execution

What: Multiple vulnerabilities allow a local attacker to execute arbitrary program code.
Who is affected: Deployments of JetBrains WebStorm.
Urgency: Remediation is important due to the potential for code execution.
Action: Update to the latest version of JetBrains WebStorm.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: CERT-Bund (BSI) Security Advisories (DE · national-cert · site)
Severity: high
Published: 2026-07-24
Exploitation: Not in CISA KEV at last sync
Language: Machine-translated to English — verify against the original

Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-2507

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-648040.14% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 4% of all scored CVEs.
Low exploitation riskCVE-2026-648050.14% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 4% of all scored CVEs.
Low exploitation riskCVE-2026-648060.14% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 4% of all scored CVEs.
Low exploitation riskCVE-2026-648070.13% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 3% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-64804	coverage & exploitation status	NVD · CVE.org
CVE-2026-64805	coverage & exploitation status	NVD · CVE.org
CVE-2026-64806	coverage & exploitation status	NVD · CVE.org
CVE-2026-64807	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for JetBrains WebStorm

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

highCVE-2026-64807: In JetBrains WebStorm before 2026.2 arbitrary code execution was possible via a project-suppli…nvd · 2026-07-23
highCVE-2026-64806: In JetBrains WebStorm before 2026.2 arbitrary code execution was possible before granting proj…nvd · 2026-07-23
highCVE-2026-64805: In JetBrains WebStorm before 2026.2 arbitrary code execution was possible before granting proj…nvd · 2026-07-23
highCVE-2026-64804: In JetBrains WebStorm before 2026.2 arbitrary code execution was possible before granting proj…nvd · 2026-07-23