CVE-2026-11696: Google Chrome Information Disclosure Flaw

CVE-2026-11696 Overview

CVE-2026-11696 is an uninitialized memory use vulnerability (CWE-457) in the Video component of Google Chrome on Windows. Versions prior to 149.0.7827.103 are affected. An attacker who has already compromised the renderer process can read potentially sensitive data from process memory by serving a crafted HTML page. Google's Chromium project rated the underlying flaw High severity, while NVD assigned a base score of 5.3 due to the prerequisite renderer compromise and the limited scope of information disclosure.

Critical Impact
A remote attacker with a compromised renderer process can leak sensitive in-process memory contents from Chrome on Windows, enabling secondary attacks such as sandbox escape preparation or credential theft.

Affected Products

Google Chrome on Windows prior to 149.0.7827.103
Microsoft Windows host platforms running vulnerable Chrome builds
Chromium-based applications embedding the affected Video component

Discovery Timeline

2026-06-09 - CVE-2026-11696 published to the National Vulnerability Database
2026-06-09 - Last updated in NVD database

Technical Details for CVE-2026-11696

Vulnerability Analysis

The defect resides in the Video subsystem of Chrome's renderer. The code path consumes a memory region before all of its bytes are deterministically initialized. When the renderer processes attacker-controlled video or media metadata delivered through a crafted HTML page, the uninitialized bytes can be returned to JavaScript or otherwise observed by attacker logic running inside the renderer. Because the renderer must already be compromised, exploitation requires chaining this issue with a separate renderer-level bug. The practical value of CVE-2026-11696 is therefore as a primitive: it leaks address space layout details, heap contents, or residual cryptographic material that supports a follow-on sandbox escape.

Root Cause

The root cause is classified as [CWE-457: Use of Uninitialized Variable]. A buffer or structure inside the Video pipeline is read along a code path that does not guarantee a prior write. On Windows, heap allocations are not zero-filled on reuse, so residual data from previously freed allocations can occupy the uninitialized region. The attacker observes these residual bytes rather than the intended media payload.

Attack Vector

Delivery occurs over the network through a crafted HTML page that the victim renders in Chrome. Exploitation also requires user interaction to load the page and a previously compromised renderer process. The attack does not require authentication. Successful exploitation impacts confidentiality only; integrity and availability are not affected. See the Chromium Issue Tracker entry and the Google Chrome Desktop Update advisory for vendor-supplied details.

No public proof-of-concept or exploit code is available at the time of writing, and the issue is not listed on the CISA Known Exploited Vulnerabilities catalog.

Detection Methods for CVE-2026-11696

Indicators of Compromise

Chrome renderer processes on Windows reporting unexpected crashes or memory access faults within media decoding modules
HTML pages embedding unusual or malformed <video> elements or media segments served from low-reputation domains
Outbound exfiltration of base64-encoded or binary payloads shortly after a media-heavy page load in chrome.exe

Detection Strategies

Inventory installed Chrome versions across Windows endpoints and flag any build below 149.0.7827.103
Monitor for renderer-to-parent IPC anomalies and child-process crashes that correlate with media playback
Hunt for browser exploitation chains by correlating renderer compromise indicators with subsequent suspicious child process activity

Monitoring Recommendations

Collect Chrome update telemetry and enforce a minimum patched version through endpoint configuration management
Capture process creation, module load, and network connection events for chrome.exe and its renderer children into a centralized analytics pipeline
Alert on disabled Chrome auto-update services or tampering with the Chrome installation directory

How to Mitigate CVE-2026-11696

Immediate Actions Required

Update Google Chrome on all Windows endpoints to version 149.0.7827.103 or later
Restart Chrome after the update to ensure the patched renderer binary is loaded
Audit managed browser policies to confirm automatic updates are enabled and not blocked by group policy

Patch Information

Google released the fix in the Stable channel update documented in the Google Chrome Desktop Update advisory. Administrators using Chrome Browser Enterprise should push the patched MSI to managed fleets and verify version reporting through the Chrome admin console. Chromium-based browsers and embedded WebView consumers should incorporate the corresponding upstream commit referenced in the Chromium Issue Tracker.

Workarounds

Restrict browsing to trusted sites through enterprise URL allowlists until patching completes
Disable or limit autoplay of media content via the AutoplayAllowed and DefaultPopupsSetting enterprise policies to reduce exposure to crafted media
Apply site isolation and ensure --site-per-process remains enabled to constrain the scope of a compromised renderer

bash

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

# Force a Chrome update check via the included updater
"%ProgramFiles%\Google\Update\GoogleUpdate.exe" /ua /installsource scheduler