CVE-2026-11700: Google Chrome Use After Free Vulnerability

CVE-2026-11700 Overview

CVE-2026-11700 is a use-after-free vulnerability [CWE-416] in the Tracing component of Google Chrome versions prior to 149.0.7827.103. A remote attacker who has already compromised the renderer process can leverage a crafted HTML page to potentially escape the Chrome sandbox. The flaw affects Chrome on Windows, macOS, and Linux platforms. Google has classified the Chromium security severity as Medium, while the National Vulnerability Database assigns a higher CVSS score reflecting the sandbox escape impact.

Critical Impact
Successful exploitation allows an attacker who controls a compromised renderer to escape the Chrome sandbox and execute code in a higher-privileged browser process, expanding access to the host system.

Affected Products

Google Chrome versions prior to 149.0.7827.103
Chrome installations on Microsoft Windows
Chrome installations on Apple macOS and Linux

Discovery Timeline

2026-06-09 - CVE-2026-11700 published to the National Vulnerability Database
2026-06-09 - Last updated in NVD database

Technical Details for CVE-2026-11700

Vulnerability Analysis

The vulnerability resides in Chrome's Tracing subsystem, which records performance and diagnostic events across browser components. A use-after-free condition occurs when the Tracing code accesses an object after its backing memory has been released. The freed memory can be reclaimed and populated with attacker-controlled data before the dangling reference is dereferenced.

Exploitation requires the attacker to first compromise the renderer process, typically through a separate memory corruption bug in the rendering pipeline. From that foothold, the attacker uses a crafted HTML page to drive interactions with the Tracing interface and trigger the dangling pointer. The result is a sandbox escape, moving code execution from the constrained renderer into a process with broader access.

The attack requires user interaction, such as visiting a malicious page, and exploitation complexity is high because it depends on chaining the bug with a prior renderer compromise and reliable heap manipulation.

Root Cause

The root cause is improper lifetime management of an object referenced by the Tracing component. Code paths in Tracing retain a pointer to a heap-allocated structure that can be freed elsewhere, leaving a dangling reference. When the Tracing logic later dereferences this pointer, the underlying memory may already be reused, producing a classic CWE-416 use-after-free condition.

Attack Vector

The attack vector is network-based and delivered through a crafted HTML page. The attacker must already control the renderer process and induce the victim to interact with malicious content. By orchestrating specific allocation and free sequences from JavaScript or other web APIs, the attacker grooms the heap so that the freed Tracing object is replaced with controlled data, allowing hijacked control flow when the stale pointer is used. Technical details are referenced in the Chromium Issue Tracker Entry.

Detection Methods for CVE-2026-11700

Indicators of Compromise

Chrome processes spawning unexpected child processes or shells immediately after browsing untrusted sites
Browser crashes referencing the Tracing component in crash reports or chrome://crashes entries
Outbound network connections from Chrome to unfamiliar hosts following visits to attacker-controlled pages

Detection Strategies

Inventory Chrome installations and flag any build below 149.0.7827.103 across Windows, macOS, and Linux endpoints
Hunt for anomalous process lineage where chrome.exe or its helpers launch interpreters such as powershell.exe, cmd.exe, or /bin/sh
Correlate browser crash telemetry with subsequent file-write or persistence activity on the same host

Monitoring Recommendations

Forward EDR process telemetry and Chrome crash reports to a centralized analytics platform for correlation
Monitor for Chrome child processes performing token manipulation, code injection, or LOLBin execution
Track Chrome version compliance through software inventory reporting and alert on drift from the patched baseline

How to Mitigate CVE-2026-11700

Immediate Actions Required

Update Chrome to version 149.0.7827.103 or later on all Windows, macOS, and Linux endpoints
Restart browser sessions after patch deployment to ensure the vulnerable code is unloaded from memory
Validate that managed Chrome deployments have auto-update enabled and reaching Google update servers

Patch Information

Google released the fix in the Chrome Stable channel update documented in the Google Chrome Stable Update. Administrators using enterprise deployment tooling should push version 149.0.7827.103 or newer through their standard channels and confirm rollout via management consoles.

Workarounds

Restrict browsing to trusted sites and block known malicious domains at the network edge until patching completes
Enforce Site Isolation and ensure no Chrome flags disabling sandboxing are set in managed policy
Limit users to standard accounts so that any post-escape code execution runs without administrative privileges

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 from the registry
reg query "HKLM\Software\Google\Update\Clients\{8A69D345-D564-463C-AFF1-A69D9E530F96}" /v pv