CVE-2026-11680: Google Chrome Use After Free Vulnerability

CVE-2026-11680 Overview

CVE-2026-11680 is a use-after-free vulnerability in the Media component of Google Chrome on Windows. The flaw affects Chrome versions prior to 149.0.7827.103 and allows a remote attacker to execute arbitrary code inside the renderer sandbox through a crafted HTML page. Google rates the Chromium security severity as High. Exploitation requires user interaction, specifically that a target visits an attacker-controlled web page. The vulnerability is tracked under [CWE-416] and falls within Chrome's Media subsystem, which handles audio and video stream processing.

Critical Impact
Successful exploitation enables arbitrary code execution inside the Chrome sandbox on Windows hosts, providing attackers an initial foothold for sandbox escape chains and follow-on compromise.

Affected Products

Google Chrome on Windows prior to 149.0.7827.103
Microsoft Windows (host operating system)
Chromium-based browsers that share the affected Media component code

Discovery Timeline

2026-06-09 - CVE-2026-11680 published to NVD
2026-06-09 - Last updated in NVD database
2026-06-11 - EPSS score recorded at 0.08% (percentile 23.604)

Technical Details for CVE-2026-11680

Vulnerability Analysis

The vulnerability is a use-after-free condition in Chrome's Media component. A use-after-free occurs when code continues to reference heap memory after that memory has been freed, allowing attackers to manipulate the contents of the reclaimed allocation. In Chrome's Media pipeline, objects managing decoder state, frame buffers, or media stream resources can be released while another execution path still holds a dangling pointer.

An attacker who controls the freed allocation can place a crafted object at the same address. When the dangling pointer is dereferenced, the attacker controls function pointers or virtual table entries used by the renderer process. This yields arbitrary code execution inside the Chrome sandbox.

The Chromium issue tracker entry 517004487 references the underlying bug. Code execution is bounded by the Chrome sandbox, but use-after-free flaws in renderer-reachable code are routinely chained with sandbox escapes to achieve full host compromise.

Root Cause

The root cause is improper object lifetime management in the Media component [CWE-416]. A reference to a media object outlives the object's destruction, leaving a dangling pointer that can be reused when the heap allocator returns the same memory region for an attacker-controlled allocation.

Attack Vector

The attack vector is network-based and requires user interaction. A victim must load a crafted HTML page in a vulnerable Chrome build. The page delivers JavaScript and media content that triggers the freed-object reuse path inside the renderer. No authentication is required. The scope is unchanged, and the impact on confidentiality, integrity, and availability is high within the renderer context.

No public proof-of-concept exploit is available, and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog. See the Chromium Issue Tracker Entry for technical references.

Detection Methods for CVE-2026-11680

Indicators of Compromise

Chrome renderer process crashes referencing the Media component or media decoder modules on Windows endpoints running versions prior to 149.0.7827.103.
Unexpected child processes spawned by chrome.exe following navigation to untrusted web pages.
Outbound network connections from Chrome renderer processes to uncategorized or newly registered domains immediately after media playback.

Detection Strategies

Inventory installed Chrome builds across the fleet and flag any version below 149.0.7827.103 on Windows.
Monitor Windows Error Reporting and crash telemetry for repeated renderer faults tied to media playback.
Correlate browser process anomalies (heap corruption signatures, exception codes such as 0xC0000005) with recent HTML page loads.

Monitoring Recommendations

Enable browser telemetry forwarding to a central log platform and alert on renderer crash spikes.
Track process lineage from chrome.exe and alert on uncommon child processes such as cmd.exe, powershell.exe, or rundll32.exe.
Apply web filtering and DNS monitoring to block access to known malicious media-delivery domains.

How to Mitigate CVE-2026-11680

Immediate Actions Required

Update Google Chrome on all Windows endpoints to version 149.0.7827.103 or later through enterprise management tooling.
Restart Chrome on every host after the update so the patched binary is loaded into memory.
Verify that Chromium-based browsers in the environment (Edge, Brave, Opera, Vivaldi) have ingested the upstream fix.

Patch Information

Google released the fix in the Stable channel update documented at Google Chrome Desktop Update. Administrators should deploy Chrome 149.0.7827.103 or later. Confirm patch deployment by checking the version reported at chrome://settings/help on representative endpoints.

Workarounds

Restrict browsing to trusted sites using web proxy or DNS filtering until patches are deployed.
Disable autoplay and limit media playback from untrusted origins through enterprise Chrome policies.
Enforce Site Isolation and ensure the renderer sandbox is enabled to contain exploitation attempts.

bash

# Verify Chrome version on Windows endpoints via PowerShell
(Get-Item "C:\Program Files\Google\Chrome\Application\chrome.exe").VersionInfo.ProductVersion

# Force enterprise update channel via Group Policy registry key
reg add "HKLM\SOFTWARE\Policies\Google\Update" /v UpdateDefault /t REG_DWORD /d 1 /f