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CVE-2026-39364 is an unauthenticated file-disclosure vulnerability in the Vite development server affecting versions 7.1.0 through 7.3.1 and 8.0.0 through 8.0.4. The development server's filesystem route can return files that match configured server.fs.deny restrictions when attackers append specific asset-handling query-parameter combinations to a request. The deny-list check is thereby bypassed and the server returns the restricted file with an HTTP 200 response, provided the file is otherwise within a directory permitted by server.fs.allow.
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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.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
24 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A CVSS 8.2 high-severity Vite development-server information-disclosure vulnerability that lets an unauthenticated remote attacker bypass server.fs.deny protections through query-parameter manipulation and retrieve sensitive files in plaintext.
A high-severity Vite file-disclosure/access-control-bypass vulnerability in which query-string variants such as ?raw, ?import&raw, and ?import&url&inline bypass server.fs.deny protections on exposed Vite development servers, enabling unauthenticated retrieval of sensitive files.
A high-severity Vite development-server file-disclosure vulnerability that allows unauthenticated attackers to bypass the server.fs.deny protection through crafted query parameters on the internal @fs route, exposing sensitive files such as .env files and certificates.
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.