CVE-2026-64807

Code execution via project-supplied linter configuration

Published Jul 23, 2026 · Updated Jul 23, 2026

Code execution in JetBrains WebStorm before 2026.2 allows attackers to run arbitrary code via a project-supplied linter configuration. The IDE accepts project-controlled linter configuration as executable functionality, but JetBrains has not disclosed the affected parser, field, or code path. Exploitation requires a user to load the crafted local project, after which code runs with the IDE user's privileges.

CVSS severity7.8
High
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code execution in JetBrains WebStorm before 2026.2 allows attackers to run arbitrary code via a project-supplied linter configuration. The IDE accepts project-controlled linter configuration as executable functionality, but JetBrains has not disclosed the affected parser, field, or code path. Exploitation requires a user to load the crafted local project, after which code runs with the IDE user's privileges.

The record

CVE
CVE-2026-64807
Published
Jul 23, 2026
Updated
Jul 23, 2026
Vendor
JetBrains
Product
WebStorm
Classifications
CWE-829, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 23, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 23, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <2026.2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

JetBrains · WebStormversion=0 <2026.2

Published CVSS scores

7.8JetBrains s.r.o.CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-829Inclusion of Functionality from Untrusted Control Sphere
T1204.002Malicious File

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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