High

Out-of-bounds read/write in Chrome WebAudio

IdentifiersCVE-2026-4459CWE-787· Out-of-bounds Write

CVE-2026-4459 is a high-severity memory safety vulnerability in the WebAudio component of Google Chrome. According to the provided content, affected Chrome versions prior to 146.0.7680.153 contain an out-of-bounds read and write condition in WebAudio that can lead to heap corruption when a user is induced to load a crafted HTML page. The issue is remotely reachable through web content and arises from improper bounds handling during WebAudio processing, allowing memory access outside the intended buffer boundaries.

For your environment

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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 can corrupt heap memory in the browser process handling the malicious page. Based on the provided content, this may enable a remote attacker to cause a crash, disclose memory contents, or potentially achieve arbitrary code execution in the context of the affected Chrome process. Google classifies the issue as High severity, and the broader advisory notes that similar Chrome memory corruption flaws may be leveraged for remote code execution after luring a victim to a malicious webpage.

Mitigation

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

Until patching is completed, reduce exposure by limiting use of untrusted websites and isolating high-risk browsing activity. Enterprise defenders can use browser management controls to accelerate stable-channel updates, restrict access to untrusted web content, and apply sandboxing and application isolation controls to reduce post-exploitation impact. No specific workaround for disabling the vulnerable WebAudio code path is provided in the supplied content.

Remediation

Patch, then assume compromise.

Upgrade Google Chrome to version 146.0.7680.153 or later. The provided content indicates that the issue is fixed in Chrome 146.0.7680.153, with Windows and macOS also receiving 146.0.7680.154 in the same stable-channel update. Apply the corresponding Chromium-based browser vendor updates as they become available.

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

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

5 SOURCESView more in app

cyber security newsNews

Mar 21, 2026

Chrome Security Update Patches 26 Vulnerabilities that Enable Attackers to Execute Malicious Code Remotely

A high-severity out-of-bounds read/write vulnerability in Chrome's WebAudio component.

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 activity2

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

EXTERNAL REFERENCES

MITRE CVE

cve.org · CVE-2026-4459

NVD

nvd.nist.gov/vuln/detail/CVE-2026-4459

MITRE CWE · CWE-787

Out-of-bounds Write

Vendor Advisory

chromereleases.googleblog.com/2026/03/stable-channel-update-for-desktop_18.html

Issue Tracking

issues.chromium.org/issues/490246422