CVE-2026-13786: Google Chrome Use After Free Vulnerability

CVE-2026-13786 Overview

CVE-2026-13786 is a use-after-free vulnerability [CWE-416] in the Ozone component of Google Chrome. Ozone is the platform abstraction layer that Chrome uses for windowing and low-level graphics on Linux and Chrome OS. Versions of Chrome prior to 150.0.7871.47 are affected. A remote attacker can execute arbitrary code by convincing a user to load a crafted HTML page. Chromium classifies the security severity as Critical, and the CVSS 3.1 base score is 8.8.

Critical Impact
Successful exploitation permits arbitrary code execution in the context of the Chrome renderer, enabling sandbox-adjacent attacks against user data and browsing sessions.

Affected Products

Google Chrome versions prior to 150.0.7871.47
Chromium-based browsers that consume the vulnerable Ozone code path
Desktop Chrome Stable channel builds before the June 2026 update

Discovery Timeline

2026-06-30 - CVE-2026-13786 published to NVD
2026-07-02 - Last updated in NVD database

Technical Details for CVE-2026-13786

Vulnerability Analysis

The defect resides in Chrome's Ozone subsystem, which mediates window, display, and input handling between the browser and the underlying OS graphics stack. A use-after-free condition arises when the Ozone code releases an object while another code path still holds a reference. When that dangling reference is later dereferenced, an attacker who has groomed the heap can steer control flow to attacker-controlled data.

Because Ozone processes content driven by web pages (through rendering, compositing, and display events), a crafted HTML document can drive the object lifecycle needed to trigger the free-then-use sequence. The result is memory corruption in a privileged browser process, which attackers commonly chain with a sandbox escape to achieve full arbitrary code execution on the host.

The vulnerability requires user interaction, specifically the victim visiting or interacting with a malicious page. No authentication is required, and the attack traverses the network via standard HTTP or HTTPS delivery.

Root Cause

The root cause is improper object lifetime management inside Ozone [CWE-416]. Reference counting or ownership tracking fails to keep a heap object alive for all consumers, allowing the allocator to reuse the freed region before the last valid access completes.

Attack Vector

An attacker hosts a crafted HTML page and lures the victim to load it. The page issues DOM, rendering, or display-related operations that provoke the vulnerable Ozone code path. After heap grooming, the reused memory contains attacker-controlled data, and the subsequent dereference yields code execution in the affected process.

No verified public proof-of-concept code is available at this time. See the Chromium Issue Tracking entry and the Google Chrome Releases blog for vendor detail.

Detection Methods for CVE-2026-13786

Indicators of Compromise

Unexpected Chrome renderer or GPU process crashes with signatures consistent with heap corruption in Ozone modules.
Outbound connections from chrome.exe or chrome child processes to newly registered or low-reputation domains immediately after page loads.
Spawning of shell, scripting, or LOLBin child processes from Chrome that do not match legitimate browser workflows.

Detection Strategies

Alert on Chrome process trees where a renderer or GPU process launches interpreters such as powershell.exe, cmd.exe, bash, or python.
Monitor for Chrome versions below 150.0.7871.47 across the fleet using endpoint inventory data.
Inspect web proxy and DNS telemetry for user visits to unfamiliar sites followed by anomalous endpoint behavior.

Monitoring Recommendations

Ingest browser process telemetry and crash reports into a centralized data lake for cross-host correlation.
Track Chrome auto-update status and flag endpoints stuck on outdated builds beyond a defined patch window.
Correlate EDR memory-integrity alerts with browsing activity to surface exploitation attempts against Ozone.

How to Mitigate CVE-2026-13786

Immediate Actions Required

Update Google Chrome to version 150.0.7871.47 or later on all Windows, macOS, and Linux endpoints.
Restart Chrome after the update so the patched binaries load into every browser session.
Audit managed Chromium-based browsers and apply vendor updates that incorporate the upstream Chromium fix.

Patch Information

Google released the fix in the Stable channel update announced in the Chrome Releases blog post. Upgrading to Chrome 150.0.7871.47 or newer eliminates the vulnerable Ozone code path. Enterprises using Chrome Browser Enterprise policies should confirm that automatic updates are enabled and that the minimum version policy enforces the fixed build.

Workarounds

Restrict browsing to trusted sites via enterprise web filtering until patches are fully deployed.
Enforce site isolation and Chrome's built-in sandbox policies through group policy or configuration profiles.
Deploy endpoint controls that block child process creation from Chrome renderer and GPU processes.

bash

# Configuration example: enforce minimum Chrome version via enterprise policy (Linux)
cat <<'EOF' > /etc/opt/chrome/policies/managed/min_version.json
{
  "BrowserSwitcherEnabled": false,
  "DeviceAutoUpdateDisabled": false,
  "TargetVersionPrefix": "150.0.7871.47"
}
EOF