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CVE-2026-19556 is a high-severity use-after-free vulnerability in V8, Google Chrome’s JavaScript and WebAssembly engine. In affected versions of Google Chrome prior to 151.0.7922.137, a remote attacker could trigger the flaw by causing a target to load a crafted HTML page. The memory safety error can result in stale object reuse within V8, leading to browser instability and enabling arbitrary code execution within the Chrome sandbox.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
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.
8 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A high-severity use-after-free vulnerability in Chrome's V8 JavaScript engine.
A high-severity use-after-free vulnerability in Chrome's V8 engine.
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.