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High

Type Confusion in V8 in Google Chrome

IdentifiersCVE-2026-4457CWE-843· Access of Resource Using…

CVE-2026-4457 is a high-severity type confusion vulnerability in the V8 JavaScript engine used by Google Chrome. According to the provided content, affected Chrome versions prior to 146.0.7680.153 can be induced via a crafted HTML page to reach heap corruption conditions. The supporting material further characterizes the issue as involving a Wasm struct confused write intended to corrupt a JSArray. One exploitability assessment in the provided context states that Wasm GC objects reside in a separate heap region from ordinary JavaScript objects, which would prevent cross-boundary corruption in that specific scenario; however, the vendor description still classifies the issue as a V8 type confusion with potential heap corruption impact.

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation could allow a remote attacker to trigger heap corruption in the browser process by convincing a user to visit a maliciously crafted webpage. In Chrome/V8, heap corruption of this class can potentially lead to process compromise, including arbitrary code execution, denial of service via renderer crash, or possibly information disclosure, depending on exploitability and surrounding mitigations. The provided content does not establish confirmed in-the-wild exploitation or a demonstrated sandbox escape for this CVE.

Mitigation

If you can’t patch tonight, do this now.

If immediate patching is not possible, reduce exposure by limiting use of untrusted websites and web content until the browser is updated. Enterprise defenders can prioritize rapid rollout of the fixed Chrome version, restrict execution of active web content where feasible, and use browser sandboxing, exploit mitigations, and application isolation controls to reduce impact. No CVE-specific workaround is provided in the supplied content.

Remediation

Patch, then assume compromise.

Update Google Chrome to version 146.0.7680.153 or later. The provided content indicates that the issue affects Google Chrome prior to 146.0.7680.153, and Google’s Stable channel update includes 146.0.7680.153/154 for Windows and macOS and 146.0.7680.153 for Linux. Apply the vendor-supplied patched build through normal browser update channels or enterprise-managed deployment.
PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType
GoogleChromeapplication

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

ACTIVITY FEED

Recent activity

8 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.

8 SOURCESView more in app
What this page doesn’t show

The version that knows your environment.

This page is what’s public. Mallory adds the parts that aren’t: which of your assets are affected, which adversaries are exploiting it right now, which detections to deploy, and what to do tonight.
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Exposure mapping

Query your assets running an affected version, and investigate the blast radius.

Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity5

Community discussion across Reddit, Mastodon, and other social sources.

EXTERNAL REFERENCES
MITRE CVE
cve.org · CVE-2026-4457
NVD
nvd.nist.gov/vuln/detail/CVE-2026-4457
MITRE CWE · CWE-843
Access of Resource Using Incompatible Type…
Vendor Advisory
chromereleases.googleblog.com/2026/03/stable-channel-update-for-desktop_18.html
Issue Tracking
issues.chromium.org/issues/488803413