CVE-2026-11262: Google Chrome Use After Free Vulnerability

CVE-2026-11262 Overview

CVE-2026-11262 is a use-after-free vulnerability in the TabStrip component of Google Chrome versions prior to 149.0.7827.53. The flaw allows a remote attacker to execute arbitrary code by tricking a user into visiting a crafted HTML page. The vulnerability is classified under [CWE-416] and affects Chrome installations across Windows, macOS, and Linux. Google addressed the issue in the stable channel update for desktop. While Chromium's internal severity rating is Low, the NVD assigns a CVSS 3.1 score of 8.8 due to the network attack vector and high impact on confidentiality, integrity, and availability.

Critical Impact
A successful exploit grants arbitrary code execution within the Chrome renderer process, enabling browser sandbox escapes when chained with additional flaws.

Affected Products

Google Chrome prior to 149.0.7827.53
Chrome installations on Microsoft Windows
Chrome installations on Apple macOS and Linux

Discovery Timeline

2026-06-05 - CVE-2026-11262 published to NVD
2026-06-05 - Last updated in NVD database

Technical Details for CVE-2026-11262

Vulnerability Analysis

The vulnerability resides in Chrome's TabStrip component, which manages the browser's tab UI elements and their lifecycle. A use-after-free condition occurs when the code references memory that has already been deallocated. An attacker who controls the freed object's contents can redirect execution flow when the dangling pointer is later dereferenced.

Exploitation requires user interaction, specifically visiting an attacker-controlled HTML page. The crafted page triggers the unsafe memory state through DOM manipulation or tab-related operations that interact with the TabStrip lifecycle. Once triggered, the attacker can achieve arbitrary code execution in the renderer process context.

The EPSS score is 0.086% at the 24.898 percentile, indicating low observed exploitation probability at disclosure. However, use-after-free flaws in browser UI components are historically reliable targets for exploit developers building full-chain attacks.

Root Cause

The root cause is improper object lifetime management within TabStrip. An object reference persists after the underlying memory has been released, leaving a dangling pointer. Subsequent operations dereference that pointer, producing memory corruption that an attacker can shape into code execution.

Attack Vector

The attack vector is network-based and requires user interaction. The victim must load attacker-controlled HTML, typically via a malicious link, compromised website, or malvertising. No authentication or elevated privileges are needed on the target system.

No public proof-of-concept code has been released. Technical details remain restricted in the Chromium Issue Tracker Report pending broader patch deployment.

Detection Methods for CVE-2026-11262

Indicators of Compromise

Chrome renderer process crashes with access violation signatures referencing TabStrip symbols
Unexpected child processes spawned from chrome.exe following a browsing session
Outbound connections to unfamiliar domains immediately after a tab-related crash event

Detection Strategies

Inventory Chrome installations and flag any version below 149.0.7827.53 across managed endpoints
Monitor for abnormal Chrome process behavior, including unexpected memory allocations and module loads in renderer processes
Correlate browser crash telemetry with subsequent process creation or persistence events

Monitoring Recommendations

Forward Chrome crash reports and Windows Error Reporting telemetry to a central SIEM for analysis
Alert on EDR detections of shellcode execution or reflective loading within chrome.exe child processes
Track web proxy logs for users visiting newly registered or low-reputation domains adjacent to crash events

How to Mitigate CVE-2026-11262

Immediate Actions Required

Update Google Chrome to version 149.0.7827.53 or later on all Windows, macOS, and Linux endpoints
Force a browser restart through endpoint management tooling to ensure the patched binary loads
Verify Chrome auto-update is enabled and functioning across the fleet

Patch Information

Google released the fix in the stable channel update referenced in the Chrome Desktop Update Announcement. Administrators should confirm deployment via the chrome://settings/help page or enterprise update reporting. Chromium-based browsers such as Microsoft Edge, Brave, and Opera typically inherit the fix once they rebase onto the patched Chromium version.

Workarounds

Restrict browsing to trusted sites through web filtering until patch deployment is verified
Deploy Chrome enterprise policies to disable execution of untrusted extensions that may aid exploitation
Apply site isolation enforcement (SitePerProcess policy) to limit renderer compromise impact

bash

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

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

# Enterprise policy: enforce site isolation
# /etc/opt/chrome/policies/managed/site_isolation.json
{
  "SitePerProcess": true,
  "IsolateOrigins": "https://*.example.com"
}