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CVE-2022-0337 is an information disclosure vulnerability in the File System API implementation in Google Chrome on Windows, prior to version 97.0.4692.71. The vulnerability arises from an inappropriate implementation that allows a remote attacker to craft an HTML page capable of accessing potentially sensitive information from the victim's system via the browser's File System API.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository provides a proof-of-concept (PoC) exploit for CVE-2022-0337, a vulnerability in the File System Access API of Chromium-based browsers (Google Chrome, Microsoft Edge, Opera) on Windows. The exploit demonstrates how a malicious website can use the window.showSaveFilePicker() method with a crafted suggested filename containing environment variable placeholders (e.g., %USERNAME%, %AWS_SECRET_ACCESS_KEY%). When a user is tricked into saving a file (e.g., by holding the ENTER key as prompted by the page), the browser resolves these placeholders to their actual values, leaking sensitive environment variables to the attacker. The repository contains two files: a detailed README.md explaining the vulnerability, affected versions, and exploitation steps, and env.html, a crafted HTML/JavaScript file that automates the attack. The exploit is a proof-of-concept and requires user interaction, but it effectively demonstrates the risk of leaking secrets such as usernames, API keys, and tokens from Windows environment variables via a browser vulnerability.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
1 sources tracked across advisories and community write-ups. News coverage will land here when it surfaces.
No news coverage yet. Advisories and community discussion only.
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.