CVE-2026-11292 in Chrome
Summary
by MITRE • 06/05/2026
Insufficient policy enforcement in Blink in Google Chrome prior to 149.0.7827.53 allowed a remote attacker to bypass content security policy via a crafted HTML page. (Chromium security severity: Low)
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Analysis
by VulDB Data Team • 06/05/2026
This vulnerability represents a critical flaw in the Blink rendering engine that powers Google Chrome and Chromium-based browsers. The issue stems from insufficient policy enforcement mechanisms that failed to properly validate content security policy directives when processing maliciously crafted HTML content. The vulnerability specifically affects versions prior to 149.0.7827.53 and demonstrates a failure in the browser's security model that could allow remote attackers to bypass crucial content protection measures. The technical implementation flaw lies in how Blink handles certain HTML elements and attributes that should trigger CSP enforcement but instead permit unauthorized content execution.
The operational impact of this vulnerability extends beyond simple privilege escalation as it undermines fundamental web security boundaries that protect users from cross-site scripting attacks and malicious code injection. When an attacker crafts a specific HTML page, they can exploit the policy enforcement gap to execute arbitrary code or access restricted resources that should normally be blocked by CSP mechanisms. This vulnerability aligns with CWE-693, which addresses protection mechanism failures, and represents a classic example of how incomplete security controls can create attack vectors. The low severity classification from Chromium security team belies the potential for significant damage when combined with other exploitation techniques or when targeting specific user populations.
Attackers could leverage this vulnerability through various delivery mechanisms including phishing campaigns, malicious websites, or compromised web pages that load the crafted HTML content. The attack surface is particularly concerning given that modern web browsers process millions of pages daily, and a single compromised website could potentially exploit this flaw across numerous users. This vulnerability intersects with ATT&CK technique T1059.001, which covers command and scripting interpreter execution, as it could enable attackers to bypass security controls that would normally prevent code execution. The flaw essentially allows attackers to circumvent the browser's built-in protections that are designed to prevent unauthorized access to resources, potentially leading to data exfiltration, session hijacking, or further system compromise.
The mitigation strategy for this vulnerability requires immediate deployment of Chrome version 149.0.7827.53 or later, which includes the necessary policy enforcement improvements. Organizations should also implement additional security measures such as strict content security policies, regular browser updates, and user education about suspicious website content. Network administrators should consider implementing web filtering solutions and monitoring for suspicious activity that might indicate exploitation attempts. The vulnerability highlights the importance of comprehensive security testing and validation of security controls, particularly in complex software systems like modern web browsers where multiple security mechanisms must work in concert to provide effective protection. Regular security assessments and penetration testing should include validation of policy enforcement mechanisms to prevent similar issues from emerging in the future.