CVE-2026-79033: Google Chrome DevTools RCE Vulnerability

CVE-2026-79033 is a remote code execution vulnerability in Google Chrome DevTools caused by insufficient control flow management. Attackers can exploit this flaw via social engineering to execute code within the sandbox. This article covers technical details, affected versions, security impact, and mitigation strategies.

CVE-2026-79033 Overview

CVE-2026-79033 is a control flow management flaw in the DevTools component of Google Chrome. Versions prior to 152.0.7977.65 are affected. A remote attacker can leverage social engineering to trick a user into interacting with a crafted HTML page. Successful exploitation allows arbitrary code execution inside the Chrome sandbox. The issue is tracked under [CWE-691: Insufficient Control Flow Management] and was addressed in the Chrome Stable channel update.

Critical Impact
Attackers can execute arbitrary code within the Chrome renderer sandbox on unpatched systems, gaining a foothold for further exploitation chains that could target sandbox escapes or credential theft.

Affected Products

Google Chrome versions prior to 152.0.7977.65 (Desktop Stable channel)
All operating systems shipping the affected Chrome build (Windows, macOS, Linux)
Chromium-based builds inheriting the vulnerable DevTools code path

Discovery Timeline

2026-08-25 - CVE-2026-79033 published to NVD
2026-08-27 - Last updated in NVD database

Technical Details for CVE-2026-79033

Vulnerability Analysis

The vulnerability resides in the DevTools subsystem of Google Chrome. DevTools is the built-in developer inspection and debugging interface. The flaw is a class of insufficient control flow management, meaning the code does not correctly enforce the sequence or state transitions expected during DevTools operations. An attacker crafts an HTML page that triggers the mishandled control flow when a user is convinced to interact with it. Exploitation results in arbitrary code execution contained within the Chrome sandbox boundary. The attack requires user interaction, aligning with the social engineering vector called out in the vendor advisory.

Root Cause

The defect is categorized as [CWE-691: Insufficient Control Flow Management]. DevTools does not enforce the intended execution ordering or state validation for certain operations initiated from web content. Untrusted input reaches privileged DevTools code paths that assume trusted, sequential invocation. This mismatch allows an attacker to steer execution into unintended branches, ultimately reaching sensitive functionality reachable from renderer context.

Attack Vector

Exploitation requires a remote attacker to host a crafted HTML page and convince a target user to open it and perform an action. The attack is network-reachable and does not require authentication. Once the user interacts with the malicious content, DevTools logic can be manipulated to run attacker-controlled code inside the Chrome sandbox. Chained with a sandbox escape, this behavior would extend impact beyond the browser process.

No public proof-of-concept or exploit code is available at the time of publication. Technical detail is available in the Chromium Issue Tracker #532914769.

Detection Methods for CVE-2026-79033

Indicators of Compromise

Chrome renderer or DevTools processes spawning unexpected child processes such as cmd.exe, powershell.exe, or shell interpreters
Outbound network connections from Chrome to unrecognized domains immediately following a user visiting an unfamiliar HTML page
Unexpected DevTools protocol traffic on the local loopback interface from non-developer workstations

Detection Strategies

Inventory installed Chrome versions across the fleet and flag any build below 152.0.7977.65
Alert on Chrome child process trees that deviate from the standard chrome.exe renderer or GPU process hierarchy
Correlate browser navigation telemetry with process creation and file write events to identify post-exploitation activity

Monitoring Recommendations

Ingest browser telemetry and endpoint process events into a centralized data lake for correlation
Monitor for DevTools being launched programmatically or opened on user endpoints outside of engineering roles
Track newly executed binaries written to user-writable paths shortly after browser sessions

How to Mitigate CVE-2026-79033

Immediate Actions Required

Update Google Chrome to version 152.0.7977.65 or later on all endpoints
Force restart of Chrome after the update to ensure the patched binaries load
Verify update deployment through management tooling and re-scan endpoints for outdated builds

Patch Information

Google released the fix in the Chrome Stable channel. Details are documented in the Google Chrome Stable Update. Administrators should validate that automatic updates are enabled and confirm the deployed version is 152.0.7977.65 or higher.

Workarounds

Instruct users to avoid opening HTML files or links from untrusted sources until patching completes
Restrict DevTools access on managed browsers using the DeveloperToolsAvailability enterprise policy where feasible
Deploy browser isolation for high-risk user groups such as executives and finance personnel until the patch is applied

bash

# Chrome Enterprise policy example to restrict DevTools (Windows registry)
reg add "HKLM\Software\Policies\Google\Chrome" /v DeveloperToolsAvailability /t REG_DWORD /d 2 /f

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