CVE-2026-79209: Google Chrome Animation RCE Vulnerability

CVE-2026-79209 Overview

CVE-2026-79209 is a type confusion vulnerability in the Animation component of Google Chrome. The flaw affects Chrome versions prior to 152.0.7977.65 and allows a remote attacker to execute arbitrary code inside the browser sandbox through a crafted HTML page. The issue is classified under CWE-843: Access of Resource Using Incompatible Type. Google rates the Chromium security severity as Medium, while NVD assigns a higher CVSS score reflecting the potential for arbitrary code execution. Exploitation requires user interaction, specifically visiting a malicious page.

Critical Impact
A remote attacker can trigger arbitrary code execution inside the Chrome renderer sandbox by luring a user to a crafted HTML page, providing a foothold for further exploitation.

Affected Products

Google Chrome versions prior to 152.0.7977.65
Chromium-based browsers incorporating the vulnerable Animation code
Desktop distributions on Windows, macOS, and Linux Stable channel

Discovery Timeline

2026-08-25 - CVE-2026-79209 published to NVD
2026-08-27 - Last updated in NVD database
2026-08 - Google releases Stable channel update addressing the flaw (Chrome Releases advisory)

Technical Details for CVE-2026-79209

Vulnerability Analysis

The vulnerability resides in the Animation subsystem of Blink, Chrome's rendering engine. Type confusion occurs when code accesses a memory object assuming one type while the object is actually of a different, incompatible type. In Chrome's Animation code, this mismatch enables an attacker to read or write memory outside the intended object layout. The result is memory corruption that can be steered toward arbitrary code execution inside the renderer process. Because renderer code runs in the sandbox, exploitation is scoped to sandboxed execution unless chained with a sandbox escape. Chromium tracks the underlying defect in Chromium Issue #495021566.

Root Cause

The root cause is improper type validation in the Animation implementation, categorized as [CWE-843]. When the code operates on animation-related objects, it treats a pointer or handle as one type while the underlying object is a different type. This gap allows attacker-controlled data to influence method dispatch, field access, or virtual table lookups. The condition is reachable through JavaScript APIs that manipulate animations on DOM elements.

Attack Vector

An attacker hosts a crafted HTML page that triggers the vulnerable animation code path. When a user visits the page, malicious JavaScript orchestrates DOM and animation state changes to produce the type mismatch. The attacker then leverages the resulting memory corruption to execute code within the renderer sandbox. No authentication is required, but user interaction is necessary to load the page.

No public proof-of-concept or exploit is available at the time of publication. Refer to the Chromium Issue Tracker for technical details as they become public after the standard restriction window.

Detection Methods for CVE-2026-79209

Indicators of Compromise

Chrome renderer processes crashing with access violations or type-related exceptions after visiting untrusted pages
Unexpected child processes spawned by chrome.exe following browsing sessions
Outbound connections from Chrome to newly registered or low-reputation domains hosting animation-heavy pages
Browser telemetry showing repeated navigation to pages that trigger renderer crashes

Detection Strategies

Inventory installed Chrome versions across managed endpoints and flag any build below 152.0.7977.65
Monitor endpoint EDR telemetry for anomalous process creation, memory injection, or shellcode patterns originating from Chrome renderer processes
Correlate web proxy logs with renderer crash events to identify malicious page delivery

Monitoring Recommendations

Ingest Chrome update and crash telemetry into a centralized data lake for version compliance and crash pattern analysis
Alert on Chrome processes launching command interpreters such as cmd.exe, powershell.exe, or /bin/sh
Track DNS and HTTP requests to newly observed domains delivered through email or messaging clients

How to Mitigate CVE-2026-79209

Immediate Actions Required

Update Google Chrome to version 152.0.7977.65 or later on all Windows, macOS, and Linux endpoints
Restart Chrome after the update completes to ensure the patched binary is loaded
Audit Chromium-based browsers and embedded WebView components for equivalent patched builds
Restrict execution of untrusted browser extensions that can influence animation or DOM manipulation

Patch Information

Google released the fix in the Chrome Stable channel update announced on the Chrome Releases blog. Users on Chrome 152.0.7977.65 or later are protected. Enterprise administrators should push the update through Google Update, managed software distribution, or MDM policies.

Workarounds

Enforce Chrome auto-update via enterprise policy to prevent version drift
Use web filtering to block navigation to untrusted or newly registered domains
Apply Site Isolation and strict sandboxing policies through Chrome enterprise settings to limit renderer exposure
Direct high-risk users to open unknown links in an isolated browsing environment until patching is verified

bash

# Verify installed Chrome version on Linux and macOS
google-chrome --version
/Applications/Google\ Chrome.app/Contents/MacOS/Google\ Chrome --version

# Windows: query installed version via registry
reg query "HKLM\Software\Google\Update\Clients\{8A69D345-D564-463C-AFF1-A69D9E530F96}" /v pv