CVE-2026-11302 in Chrome
Summary
by MITRE • 06/05/2026
Insufficient policy enforcement in Chrome for iOS in Google Chrome on iOS prior to 149.0.7827.53 allowed a remote attacker to bypass discretionary access control 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 weakness in the discretionary access control mechanisms implemented within Google Chrome for iOS, specifically affecting versions prior to 149.0.7827.53. The flaw manifests as insufficient policy enforcement that allows remote attackers to bypass security controls through maliciously crafted HTML content, fundamentally undermining the browser's security architecture. The vulnerability operates at the intersection of web browser security and operating system access control models, where the iOS platform's security boundaries are inadvertently circumvented through crafted web content.
The technical implementation of this vulnerability stems from inadequate validation of access control policies when processing web content on iOS devices. When Chrome for iOS encounters crafted HTML pages, the browser fails to properly enforce the discretionary access control mechanisms that should prevent unauthorized access to system resources or user data. This weakness enables attackers to exploit the browser's security model through web-based attacks, potentially gaining access to restricted resources or performing actions that should be prohibited by the system's access control policies. The Chromium security severity classification of Low suggests the impact may be limited, but the nature of the bypass indicates potential for more severe consequences depending on the specific implementation details.
The operational impact of this vulnerability extends beyond simple web browsing risks, as it represents a fundamental breakdown in the security model between the browser and the underlying iOS operating system. Attackers can leverage this weakness to execute unauthorized actions through web pages, potentially leading to data exposure, privilege escalation, or other security violations that compromise user privacy and system integrity. The remote nature of the attack vector means that users can be compromised without any local interaction or user consent, making this particularly dangerous in phishing campaigns or malicious website scenarios. This vulnerability directly impacts the principle of least privilege and could allow attackers to bypass security controls that are fundamental to iOS application sandboxing.
Mitigation strategies for this vulnerability require immediate patching of affected Chrome for iOS versions to 149.0.7827.53 or later, as this represents the primary defense against the exploitation. Organizations should implement comprehensive browser update policies to ensure all devices receive security patches promptly. Additional protective measures include network-based filtering to block suspicious web content, enhanced user education regarding website verification, and monitoring for unusual browser behavior that might indicate exploitation attempts. Security teams should also consider implementing browser security extensions or content filtering solutions as additional layers of protection. The vulnerability aligns with ATT&CK technique T1059.001 for executing malicious code through web browsers, and CWE-284 for improper access control in web applications, making it a significant concern for organizations implementing mobile security policies.
This vulnerability demonstrates the complexity of mobile browser security in sandboxed environments where web content must be strictly separated from system resources while maintaining functional web browsing capabilities. The issue highlights the challenges of implementing robust access control in mobile operating systems where browser security models must integrate seamlessly with platform security mechanisms. Organizations should conduct regular security assessments of their mobile browser configurations and maintain awareness of similar vulnerabilities that may affect other browser implementations on mobile platforms. The remediation process should include thorough testing of patched versions to ensure that security improvements do not negatively impact legitimate browser functionality while effectively addressing the access control bypass.