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CVE-2026-87639 is a high-severity use-after-free vulnerability in Google Chrome's WebPackaging component affecting versions before 153.0.8010.36. An attacker that has compromised the Chrome renderer process can use a crafted HTML page to potentially execute arbitrary code outside the browser 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.
7 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A serious use-after-free vulnerability in Chrome's WebPackaging component, identified with assistance from OpenAI Codex Security.
A high-severity use-after-free vulnerability in Chrome's WebPackaging component.
A high-severity use-after-free vulnerability in Chrome's WebPackaging component fixed in the update.
A high-severity use-after-free vulnerability in Google Chrome's WebPackaging component that could allow an attacker who has already compromised the renderer process to execute arbitrary code outside Chrome's sandbox through a crafted HTML page.
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.