CVE-2026-11684 in Chrome
Summary
by MITRE • 06/09/2026
Insufficient policy enforcement in Network in Google Chrome prior to 149.0.7827.103 allowed a remote attacker who had compromised the utility process to leak cross-origin data via a crafted HTML page. (Chromium security severity: High)
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Analysis
by VulDB Data Team • 06/15/2026
This vulnerability represents a critical security flaw in Google Chrome's cross-origin resource sharing policies that existed prior to version 149.0.7827.103. The issue stems from inadequate enforcement of security policies within the browser's network layer, specifically affecting how the utility process handles cross-origin data access. The vulnerability falls under the category of insufficient policy enforcement as defined by CWE-693, where security controls fail to properly restrict access to sensitive resources. The attack vector requires an initial compromise of the utility process, which serves as a privileged component within Chrome's architecture that handles various system-level operations and network communications.
The technical implementation of this vulnerability allows a remote attacker to exploit a compromised utility process to access data from different origins that should normally be restricted by the browser's same-origin policy. This occurs because the network in Chrome failed to properly validate or enforce access controls when the utility process attempts to retrieve cross-origin resources. The utility process in Chrome operates with elevated privileges and is responsible for handling various network operations, making it a prime target for attackers seeking to escalate privileges and access restricted information. The flaw essentially creates a bypass mechanism that allows cross-origin data leakage when the utility process is already compromised.
The operational impact of this vulnerability extends beyond simple data leakage, as it represents a significant compromise of Chrome's security model that could enable further attacks. An attacker who gains control of the utility process can leverage this vulnerability to access sensitive information from other origins, potentially including user credentials, personal data, or confidential communications. This type of attack aligns with techniques described in the ATT&CK framework under privilege escalation and credential access domains, where adversaries exploit process-level vulnerabilities to gain access to restricted resources. The vulnerability's high severity classification by Chromium reflects the potential for significant data breaches and the relatively straightforward exploitation path that exists when an attacker can compromise the utility process.
Mitigation strategies for this vulnerability require immediate patching of Chrome installations to version 149.0.7827.103 or later, which contains the necessary policy enforcement fixes. Organizations should implement network monitoring to detect unusual utility process behavior that might indicate compromise, as well as maintain comprehensive patch management programs to ensure all browser components remain up to date. The fix addresses the root cause by strengthening the policy enforcement mechanisms within the utility process, ensuring that cross-origin access attempts are properly validated and restricted according to established security boundaries. Additionally, security teams should review their incident response procedures to account for potential utility process compromises and implement additional monitoring controls to detect unauthorized access to cross-origin resources. This vulnerability underscores the importance of maintaining robust process isolation and access controls within browser architectures, particularly for privileged processes that handle network communications and resource access.