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CVE-2026-85046 is a type confusion vulnerability in Google Chrome’s V8 JavaScript engine.
It affects Chrome versions before 152.0.7977.82.
It also affects V8 versions before 15.3.48.
The weakness is CWE-843, Access of Resource Using Incompatible Type.
Chromium rates the security severity as High.
A remote attacker can trigger the issue with a crafted HTML page.
The page causes JavaScript code to run in the V8 engine.
V8 uses hidden classes, maps, and inline caches to optimize JavaScript.
Turbofan and Maglev can compile hot JavaScript functions into machine code.
Type feedback tells the JIT what object shapes and types are expected.
A type confusion occurs when V8 trusts incompatible type information.
The engine then treats an object as a different type than it really is.
This can produce invalid memory access inside the renderer process.
The attacker can use the corruption to execute arbitrary code inside the sandbox.
The sandbox limits the code to the Chrome renderer process.
The vulnerability does not automatically escape the Chrome sandbox.
The crafted HTML page is the remote attack vector.
No user interaction beyond visiting the page may be required.
CISA added the issue to the Known Exploited Vulnerabilities Catalog.
CISA lists the vulnerability name as Google Chromium V8 Type Confusion Vulnerability.
CISA added it on September 04, 2026.
CISA set the due date as September 18, 2026.
CISA requires applying mitigations per vendor instructions.
CISA references BOD 26-04 risk-based security updates.
CISA also references Forensics Triage Requirements.
NVD published the CVE on Sep 03, 2026.
NVD last modified the CVE on Sep 08, 2026.
The source of the CVE record is Chrome.
References include vendor advisory, exploit, patch, issue tracking, and US Government Resource.
The fix is Chrome 152.0.7977.82 or later and V8 15.3.48 or later.
DailyCVE Form:
Platform: Google Chrome
Version: < 152.0.7977.82
Vulnerability : V8 Type Confusion
Severity: High
date: 2026-09-03
Prediction: 2026-09-18
(end of form)
What Undercode Say:
Analytics:
curl -s "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-85046" | jq '.vulnerabilities[bash].cve' curl -s "https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json" | jq '.vulnerabilities[] | select(.cveID=="CVE-2026-85046")' google-chrome --version
const m = navigator.userAgent.match(/Chrome\/(\d+.\d+.\d+.\d+)/); console.log(m ? m[bash] : "unknown");
Exploit: (Educational Purposes!)
Educational only: isolated lab google-chrome --version
// Educational only: type confusion surface sketch
function readValue(o) { return o.value; }
readValue({ value: 1 });
readValue({ value: 1.1 });
// No weaponized exploit provided.
Protection: from this CVE
sudo apt update && sudo apt install --only-upgrade google-chrome-stable google-chrome --version
brew upgrade --cask google-chrome
winget upgrade Google.Chrome
Apply CISA BOD 26-04 mitigations Due 2026-09-18
Impact:
Remote code execution inside sandbox.
CISA Known Exploited Vulnerabilities Catalog.
High severity.
Due date 2026-09-18.
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Sources:
Reported By: nvd.nist.gov
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