CVE-2026-79227 Overview
CVE-2026-79227 is a type confusion vulnerability in the DevTools component of Google Chrome prior to version 152.0.7977.65. A remote attacker who successfully lures a user to a crafted HTML page can trigger the flaw and execute arbitrary code inside the Chrome renderer sandbox. Exploitation requires user interaction, aligning with the social engineering vector described in the advisory. The issue is tracked under CWE-843: Access of Resource Using Incompatible Type and was addressed in the Chrome Stable channel update for desktop.
Critical Impact
Successful exploitation yields arbitrary code execution within the Chrome sandbox, providing an initial foothold that attackers can chain with a sandbox escape for full system compromise.
Affected Products
- Google Chrome for Desktop prior to 152.0.7977.65
- Chromium-based browsers sharing the vulnerable DevTools code path
- Downstream distributions bundling pre-patch Chromium builds
Discovery Timeline
- 2026-08-25 - CVE-2026-79227 published to NVD
- 2026-08-27 - Last updated in NVD database
Technical Details for CVE-2026-79227
Vulnerability Analysis
The vulnerability is a type confusion condition in Chrome DevTools. Type confusion occurs when code allocates or accesses a resource using one type but later operates on it as an incompatible type. In JavaScript engines and DevTools bindings, this class of bug typically produces attacker-controlled reads or writes into adjacent object memory. An attacker leverages this primitive to corrupt object metadata, hijack control flow, and execute arbitrary code in the renderer process.
Exploitation is delivered through a crafted HTML page. The advisory notes that social engineering is required, indicating that the victim must be persuaded to open the page or interact with DevTools in a way that triggers the vulnerable code path. Code execution is confined to the Chrome sandbox, but renderer compromise is commonly used as the first stage in a multi-bug chain that pairs the flaw with a separate sandbox escape.
Root Cause
The root cause is improper type validation inside DevTools code paths, categorized as CWE-843. The component processes an object under an assumed type without verifying that the underlying representation matches, allowing attacker-influenced data to be reinterpreted as a different structure. Chromium tracks the specific fix under Chromium Issue Tracker #532162132.
Attack Vector
The attack is network-reachable and requires user interaction. An attacker hosts a crafted HTML page and uses social engineering, such as phishing links or malicious advertising, to bring the victim to the page. When the page is rendered or when DevTools processes the crafted content, the type confusion triggers and delivers arbitrary code execution inside the renderer sandbox. See the Google Chrome Stable Update for release-level details.
Detection Methods for CVE-2026-79227
Indicators of Compromise
- Chrome browser processes spawning unexpected child processes such as command interpreters or scripting hosts shortly after page navigation
- Renderer process crashes referencing DevTools frames in Chrome crash reports on hosts running vulnerable Chrome builds
- Outbound connections from a browser session to newly registered or low-reputation domains delivering HTML payloads
Detection Strategies
- Inventory installed browser versions and flag any Chrome desktop build below 152.0.7977.65 as vulnerable
- Hunt for anomalous parent-child process relationships originating from chrome.exe or chromium binaries
- Correlate web proxy telemetry with endpoint navigation events to identify user visits to suspicious HTML lures
Monitoring Recommendations
- Enable EDR telemetry for browser process trees, in-memory injection attempts, and unusual DLL loads within renderer processes
- Alert on Chrome renderer crashes at scale, which frequently precede successful exploitation attempts
- Ingest browser update posture into the SIEM to continuously validate patch coverage across the fleet
How to Mitigate CVE-2026-79227
Immediate Actions Required
- Update Google Chrome to 152.0.7977.65 or later on all desktop endpoints
- Restart the browser after updating to ensure the patched binary is loaded into memory
- Apply corresponding updates to Chromium-based browsers once vendors release aligned builds
Patch Information
Google addressed the vulnerability in the Chrome Stable channel release documented in the Chrome Releases blog. Administrators managing Chrome through enterprise policy should validate that automatic updates are enabled and that the deployed version is at or above 152.0.7977.65. Chromium fix details are tracked in Chromium Issue #532162132.
Workarounds
- Enforce Chrome auto-update policies and block launch of outdated versions using enterprise browser management
- Restrict access to untrusted websites through DNS filtering and secure web gateway policies until patching completes
- Deliver targeted user awareness guidance highlighting the social engineering component required to trigger exploitation
# Verify installed Chrome version on Linux/macOS endpoints
google-chrome --version
# Windows: query the installed version from the registry
reg query "HKLM\SOFTWARE\WOW6432Node\Google\Update\Clients\{8A69D345-D564-463C-AFF1-A69D9E530F96}" /v pv
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
