CVE-2026-11688: Inappropriate implementation in SVG in Google Chrome prior to 149

Synopsis

This is an inappropriate implementation flaw in the SVG rendering engine of Google Chrome versions prior to 149.0.7827.103. The vulnerability is reachable over the network and requires no authentication, but does require the target user to visit or be redirected to a crafted HTML page. Successful exploitation allows a remote attacker to execute arbitrary code inside the Chrome sandbox, which combined with a sandbox escape could lead to full code execution on the host. A patched-image rebuild at version 149.0.7827.103 is available on HarborGuard for affected environments.

HarborGuard Coverage

Exploit Conditions

• Network reachabilityRequired

  The attacker delivers the exploit over the network; the target Chrome instance must be able to reach and render an attacker-controlled or compromised HTML page.

• AuthenticationNot required

  No authentication is required; the attacker needs no account or credential on the target system to trigger the vulnerability.

• Victim interactionRequired

  The target user must visit or be lured to a crafted HTML page, making this a social-engineering vector (phishing link, malicious ad, or compromised site).

• Attack complexityDetail

  Attack complexity is low, meaning the exploit is reliable and does not depend on race conditions, specific memory layouts, or other unpredictable environmental factors.

Blast Radius

• Executes arbitrary code within the Chrome renderer sandbox, giving the attacker a foothold inside the browser process.
• Reads confidential browser data accessible to the renderer, including page content, cached credentials, and session tokens from visited sites.
• Modifies or injects content into pages rendered in the affected process, enabling credential harvesting or malicious redirects.
• Crashes or destabilizes the affected browser process, causing denial of service for the user session.