CVE-2026-13809 in Chrome
Summary
by MITRE • 07/01/2026
Side-channel information leakage in Safe Browsing in Google Chrome on iOS prior to 150.0.7871.47 allowed a remote attacker who had compromised the renderer process to leak cross-origin data via a crafted HTML page. (Chromium security severity: High)
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Analysis
by VulDB Data Team • 07/01/2026
This vulnerability represents a critical side-channel information leakage flaw in Google Chrome's Safe Browsing implementation on iOS platforms, specifically affecting versions prior to 150.0.7871.47. The issue stems from insufficient isolation mechanisms within the browser's security architecture that allow malicious actors with compromised renderer processes to extract sensitive cross-origin data through carefully crafted HTML content. The vulnerability operates at the intersection of browser security boundaries and represents a sophisticated attack vector that exploits the fundamental trust assumptions between different browser components. From a technical perspective, this flaw manifests as an improper handling of memory access patterns and timing variations that occur during Safe Browsing operations, creating observable side-channel signals that can be exploited to infer information about resources accessed across different origins.
The operational impact of this vulnerability extends beyond simple data leakage, as it enables attackers to reconstruct sensitive information about user browsing behavior, potentially including visited websites, authentication tokens, or personal data from cross-origin resources. This type of attack falls under the category of cache timing attacks and memory access pattern analysis, which are classified under CWE-203 - Information Exposure Through Log Data and CWE-310 - Cryptographic Issues. The vulnerability's exploitation requires an attacker to first compromise a renderer process through techniques such as sandbox escape or exploit delivery, after which they can leverage the side-channel to gather cross-origin information. This attack model aligns with ATT&CK technique T1059.007 - Command and Scripting Interpreter: JavaScript, where attackers use browser-based scripting to manipulate memory access patterns for information extraction.
The security implications of this vulnerability are particularly severe in mobile environments where Chrome's Safe Browsing features operate under additional constraints due to iOS's stricter sandboxing policies. The flaw demonstrates a failure in the principle of least privilege and proper isolation between browser components, as the Safe Browsing mechanism should not be able to provide information leakage channels that expose cross-origin data. This vulnerability affects the integrity of Chrome's security model on iOS platforms and represents a regression in the security posture of the browser. Organizations relying on Chrome for iOS may face significant risks if attackers can leverage this flaw to perform reconnaissance or credential harvesting activities, particularly in environments where users access sensitive corporate or personal information.
Mitigation strategies for this vulnerability require immediate patching to the affected Chrome versions, as well as enhanced monitoring for potential exploitation attempts. System administrators should implement network-based detection measures to identify unusual patterns of cross-origin resource access that might indicate side-channel attacks. The fix typically involves strengthening memory access controls and ensuring proper isolation between renderer processes and Safe Browsing components. Additionally, organizations should consider implementing browser hardening measures such as disabling unnecessary browser features, restricting cross-origin resource sharing, and deploying advanced endpoint protection solutions that can detect anomalous memory access patterns. This vulnerability underscores the importance of continuous security auditing of browser security features and highlights the need for robust side-channel resistance mechanisms in modern web browsers.