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CVE-2025-13721 is a race condition vulnerability in the V8 JavaScript engine used by Google Chrome. It affects Google Chrome versions prior to 143.0.7499.41 and can be triggered by a remote attacker through a crafted HTML page. The flaw may lead to heap corruption during V8 processing of attacker-controlled web content. The issue is classified by Chromium as medium severity.
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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.
13 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A medium-severity race condition vulnerability in the Chrome V8 JavaScript engine.
Specific non-Microsoft CVE republished by Microsoft for Microsoft Edge (Chromium-based).
A republished non-Microsoft CVE affecting Microsoft Edge (Chromium-based).
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.