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PatchSiren cyber security CVE debrief

CVE-2026-64807 JetBrains CVE debrief

CVE-2026-64807 is a HIGH-severity vulnerability in JetBrains WebStorm before version 2026.2, allowing arbitrary code execution via a project-supplied linter configuration. The vulnerability has a CVSS score of 7.8 and is classified under CWE-829. Users of affected versions should review and update their installations to prevent potential code execution. This vulnerability was published on 2026-07-23T12:18:36.217Z and has not been modified since then.

Vendor
JetBrains
Product
WebStorm
CVSS
HIGH 7.8
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 before version 2026.2, administrators, and security teams should be aware of this vulnerability and take steps to update or mitigate the risk. This includes reviewing project-supplied linter configurations and implementing additional security measures to monitor and restrict code execution. Operators and platform administrators should prioritize updates and vulnerability management for affected deployments.

Technical summary

CVE-2026-64807 is a HIGH-severity vulnerability in JetBrains WebStorm before version 2026.2, allowing arbitrary code execution via a project-supplied linter configuration. The vulnerability has a CVSS score of 7.8. Affected users should update to version 2026.2.1 or later to address the vulnerability.

Defensive priority

Administrators should prioritize updating JetBrains WebStorm to version 2026.2.1 or later to address the arbitrary code execution vulnerability.

Recommended defensive actions

  • Update JetBrains WebStorm to version 2026.2.1 or later
  • Review project-supplied linter configurations for potential security risks
  • Implement additional security measures to monitor and restrict code execution

Evidence notes

The CVE record indicates that JetBrains WebStorm before version 2026.2 was vulnerable to arbitrary code execution via a project-supplied linter configuration. The NVD entry is currently Analyzed. Evidence is limited to CVE and NVD details. Defenders should verify WebStorm versions and review project configurations for potential security risks.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-64807 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-64807

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-64807 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-64807

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.