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CVE-2026-64804 is an arbitrary code execution vulnerability affecting JetBrains WebStorm versions before 2026.2. The issue occurs in the handling of project-local linter tooling and can be triggered before the IDE's project trust decision is granted. Opening a malicious project can cause WebStorm to invoke or process untrusted project-supplied linter tooling in a way that permits execution of attacker-controlled code prior to the expected trust boundary being enforced. The vulnerability is classified as CWE-829, reflecting inclusion or execution of functionality from an untrusted control sphere.
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What an attacker gets, and what they’ve been doing with it.
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No public exploit code observed for this vulnerability.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
3 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A JetBrains vulnerability listed among the patched issues; the article does not further describe the flaw beyond its CWE and fixed version.
An arbitrary code execution vulnerability in JetBrains WebStorm affecting versions before 2026.2, where code execution was possible prior to granting project trust through project-local linter tooling.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.