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CVE-2026-8512 is a critical use-after-free vulnerability in the FileSystem component of Google Chrome on macOS, affecting Chrome versions prior to 148.0.7778.168. The flaw is associated with Chrome’s File System Access API and macOS folder-watching callback handling. Chrome monitors filesystem changes on macOS and receives operating-system callbacks when watched content changes. The vulnerability arises from incorrect object lifetime management during this callback flow, allowing an object involved in the callback path to be freed while still in use. Research discussing the upstream fix indicates the issue was addressed by introducing an intermediary object and requiring multiple live references to keep that object valid throughout callback execution. A remote attacker could trigger the condition using a crafted HTML page if the target user performed specific UI gestures, potentially leading to a sandbox escape.
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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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A use-after-free vulnerability in Chrome's File System Access API on macOS, included in the AI patch generation study.
A use-after-free vulnerability in Chrome's File System Access API on macOS, included in the study for testing patch efficacy.
A use-after-free vulnerability in Chrome's File System Access API on macOS, selected for testing AI-generated patch quality.
A Chromium vulnerability involving Chrome’s macOS folder-change callback handling, where incorrect lifetime management can leave the flaw effectively unfixed if both required ownership claims are not implemented.
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.