CVE-2026-4462: Google Chrome Out of Bounds Read Flaw

CVE-2026-4462 Overview

CVE-2026-4462 is an out-of-bounds read vulnerability in the Blink rendering engine used by Google Chrome. The flaw affects Chrome versions prior to 146.0.7680.153 across Windows, macOS, and Linux platforms. A remote attacker can trigger the condition by serving a crafted HTML page to a target user, causing Chrome to read memory outside the bounds of an intended buffer. Google classified the Chromium security severity as High. The issue is tracked as [CWE-125: Out-of-bounds Read].

Critical Impact
A remote attacker can read sensitive memory from the renderer process by enticing a user to visit a malicious web page, potentially leaking data and aiding further exploitation.

Affected Products

Google Chrome versions prior to 146.0.7680.153
Chrome installations on Microsoft Windows, Apple macOS, and Linux
Chromium-based browsers and embedded frameworks that ship the affected Blink engine

Discovery Timeline

2026-03-20 - CVE-2026-4462 published to NVD
2026-03-20 - Last updated in NVD database
Stable channel update - Google released the fix in the Chrome Stable Channel Update for Desktop

Technical Details for CVE-2026-4462

Vulnerability Analysis

The vulnerability resides in Blink, the rendering engine that parses and lays out HTML, CSS, and related web content in Chromium. An out-of-bounds read occurs when code accesses memory positions outside the allocated buffer boundaries. In Blink, this typically happens during parsing or manipulation of DOM structures driven by attacker-controlled HTML. The condition is reachable from any web origin, requiring only that the victim load a crafted page. Successful triggering allows the attacker to read process memory that may contain pointers, tokens, or cross-origin data. Such leaks frequently serve as a primitive for bypassing Address Space Layout Randomization (ASLR) in subsequent renderer exploitation.

Root Cause

The root cause is missing or incorrect bounds validation in a Blink code path that indexes into a buffer based on values influenced by HTML content. When the index or length exceeds the allocated region, Blink reads adjacent heap memory. The Chromium issue tracker entry for this defect is restricted, which is standard practice while users update.

Attack Vector

Exploitation requires user interaction. The attacker hosts or injects a crafted HTML page and convinces the victim to visit it through phishing, malvertising, or a compromised site. Once the page renders, the malicious markup or script triggers the vulnerable Blink path. No authentication is required, and the attack proceeds over the network against the default Chrome configuration.

No public proof-of-concept code is currently available. Technical specifics are documented in the Chromium Issue Tracker entry, which remains access-restricted at the time of publication.

Detection Methods for CVE-2026-4462

Indicators of Compromise

Chrome renderer process crashes or unexpected tab terminations correlated with visits to untrusted domains
Outbound connections from browser processes to newly registered or low-reputation domains hosting heavy JavaScript or unusual HTML structures
Browser telemetry showing Chrome versions older than 146.0.7680.153 in the environment

Detection Strategies

Inventory installed Chrome versions across managed endpoints and flag any build below 146.0.7680.153
Monitor proxy and DNS logs for users navigating to suspicious URLs flagged by threat intelligence feeds
Correlate browser process anomalies with web navigation events to identify potential exploitation attempts

Monitoring Recommendations

Enable enterprise reporting in Chrome to centralize version and extension telemetry
Forward browser process and child-process events to a centralized analytics platform for behavioral baselining
Track renderer process memory and crash signatures that may indicate failed exploitation attempts

How to Mitigate CVE-2026-4462

Immediate Actions Required

Update Google Chrome to version 146.0.7680.153 or later on all Windows, macOS, and Linux endpoints
Restart Chrome after applying the update to ensure the patched binaries are loaded
Audit Chromium-based browsers and Electron applications for embedded Blink versions and update accordingly

Patch Information

Google released the fix in the Chrome stable channel update covered by the Chrome Releases announcement. Administrators should validate that Chrome auto-update is enabled and not blocked by group policy. Managed deployments should push the update through configuration management tooling.

Workarounds

Restrict browsing to trusted sites using URL filtering or secure web gateways until patching completes
Apply enterprise policies that disable or constrain risky browser features for unpatched hosts
Use site isolation and per-origin process separation, which remain enabled by default in modern Chrome builds

bash

# Verify the installed Chrome version on Linux
google-chrome --version

# Verify on macOS
/Applications/Google\ Chrome.app/Contents/MacOS/Google\ Chrome --version

# Verify on Windows (PowerShell)
(Get-Item "$env:ProgramFiles\Google\Chrome\Application\chrome.exe").VersionInfo.ProductVersion