CVE-2026-11076: Chrome Type Confusion Vulnerability Enables Arbitrary Code Execution

Technical summary

CVE-2026-11076 is a type confusion flaw (CWE-843) in Chrome's Cascading Style Sheets (CSS) processing engine. Type confusion occurs when the browser misinterprets the data type of an object in memory, allowing an attacker to manipulate that object in unintended ways. In this case, a crafted HTML page exploits this confusion during CSS parsing or evaluation, leading to arbitrary code execution within the Chrome sandbox. While the sandbox provides a security boundary, arbitrary code execution inside it still constitutes a significant compromise, potentially allowing data theft, credential harvesting, or as a pivot point for further attacks.

Business impact

This vulnerability poses substantial risk to organizations whose users rely on Chrome for business operations. Compromised browsers can be used to steal sensitive data, intercept communications, harvest credentials, or establish persistence on endpoints. The requirement for user interaction means targeted phishing campaigns or malicious advertisements could be leveraged to distribute exploit payloads. The HIGH CVSS score (8.8) reflects the combination of remote exploitability, high confidentiality/integrity/availability impact, and the widespread deployment of Chrome across enterprises.

Affected systems

Google Chrome prior to version 149.0.7827.53 is directly affected. Users on Windows, macOS, and Linux platforms running vulnerable Chrome versions are at risk. The vulnerability does not affect the operating systems themselves, but rather the browser running on them, meaning all major desktop platforms present exposure.

Exploitability

Exploitation requires user interaction—the target must visit or be directed to a malicious HTML page. No special privileges, authentication, or complex attack conditions are needed on the attacker's side. The attack vector is network-based, making it trivially distributable via email, malicious websites, or compromised legitimate sites. Given the low barrier to entry and broad Chrome user base, this vulnerability is likely to see active exploitation if public proof-of-concept details emerge.

Remediation

Update Google Chrome to version 149.0.7827.53 or later on all affected systems. Chrome typically auto-updates, but users should verify their installation is current. For organizations managing Chrome deployments, ensure update policies are configured to deploy this patch promptly and confirm rollout across the estate. Users unable to update immediately should avoid clicking untrusted links and disable JavaScript in the browser if possible (though this may break legitimate sites).

Patch guidance

Deploy Chrome version 149.0.7827.53 or later across your organization as an urgent priority. Chrome's auto-update mechanism should roll out the fix automatically in most environments, but do not rely on passive updates—actively verify and push the patch to any devices using older versions. Check Chrome's release notes and security advisories to confirm the patch is included in any intermediate versions your organization may be running. For enterprise environments using Chrome Enterprise, utilize your device management platform to force installation of the patched version and monitor compliance.

Detection guidance

Monitor for Chrome crash dumps, segmentation faults, or unusual memory corruption events that might indicate exploitation attempts. Web proxy and email gateway logs should be reviewed for suspicious HTML attachments or links to unusual domains. Endpoint detection and response (EDR) solutions should alert on unusual process spawning, memory access patterns, or sandbox escape indicators from Chrome processes. Network-based detection is challenging as the exploit is delivered via HTTP/HTTPS; focus on behavioral signals post-compromise such as unexpected outbound connections, credential access, or data exfiltration from Chrome processes.

Why prioritize this

This vulnerability merits immediate patching priority due to its HIGH CVSS score, remote attack vector, user interaction requirement that is easily satisfied via phishing, and the critical role Chrome plays in business operations. The type confusion flaw represents a fundamental memory safety issue with broad exploitation potential. Although not yet listed on CISA's Known Exploited Vulnerabilities catalog, the attack surface and ease of weaponization suggest rapid adoption by threat actors is likely.

Risk score, explained

The CVSS v3.1 score of 8.8 (HIGH) reflects: network-based attack vector (AV:N) requiring no special access or configuration; low attack complexity (AC:L) once the malicious HTML is crafted; no privileges required (PR:N); user interaction needed to click a link or visit a page (UI:R); impact contained to the compromised user's session (S:U); but high impact across confidentiality, integrity, and availability (C:H/I:H/A:H) of data and processes within that session. The score appropriately captures the severity: easy exploitation with high user-level impact, though not system-wide compromise due to sandboxing.

Frequently asked questions