CVE-2026-11233 in Chrome
Summary
by MITRE • 06/05/2026
Insufficient policy enforcement in FoldableAPIs in Google Chrome prior to 149.0.7827.53 allowed a remote attacker who had compromised the renderer process to bypass same origin policy via a crafted HTML page. (Chromium security severity: Low)
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Analysis
by VulDB Data Team • 06/07/2026
The vulnerability in question represents a critical policy enforcement failure within Google Chrome's FoldableAPIs implementation that existed prior to version 149.0.7827.53. This weakness stems from inadequate validation mechanisms that govern how the browser handles cross-origin requests and resource access patterns, particularly within the context of foldable device support. The vulnerability manifests when an attacker successfully compromises the renderer process, which then enables them to craft malicious HTML pages that exploit the flawed policy enforcement to bypass the fundamental same origin policy that normally protects web applications from unauthorized cross-origin access.
The technical flaw resides in the insufficient validation of API access controls within the FoldableAPIs framework, which is designed to support the unique capabilities of foldable devices such as screen orientation changes and adaptive layouts. When the renderer process is compromised, attackers can leverage this vulnerability to construct HTML content that triggers the flawed API handling logic, effectively circumventing the browser's built-in security boundaries. This allows malicious actors to access resources and data that should normally be restricted to the same origin, creating a pathway for unauthorized data exfiltration, cross-site request forgery, or further exploitation of the compromised system. The vulnerability's classification as low severity by Chromium indicates that the attack vector requires a pre-existing compromise of the renderer process, making it less immediately dangerous than other classes of vulnerabilities but still concerning for overall system security.
The operational impact of this vulnerability extends beyond simple policy bypass, as it represents a fundamental weakness in Chrome's security architecture that could potentially enable more sophisticated attacks when combined with other exploits. Attackers who have already gained access to the renderer process can use this vulnerability to expand their privileges and access additional system resources that would normally be protected. This weakness particularly affects users of foldable devices where the additional API surface area provides more opportunities for exploitation. The vulnerability demonstrates a failure in the principle of least privilege enforcement, where the system should have prevented unauthorized access regardless of the initial compromise. Security researchers have noted that this type of vulnerability often indicates broader architectural issues in how browser vendors implement security controls for specialized device APIs, where the additional functionality creates new attack surfaces that are not adequately secured.
Mitigation strategies for this vulnerability require immediate patching of Chrome installations to version 149.0.7827.53 or later, where the policy enforcement has been strengthened to properly validate API access requests. Organizations should implement network monitoring to detect unusual patterns of cross-origin requests that might indicate exploitation attempts, and should consider deploying additional security layers such as content security policies to further restrict API access. The vulnerability aligns with CWE-693, which covers inadequate protection mechanisms, and demonstrates characteristics consistent with ATT&CK technique T1059.001 for command and scripting interpreter execution, as exploitation typically involves crafting malicious HTML content. System administrators should also consider implementing process isolation techniques and privilege separation to minimize the impact of any potential renderer compromise, as the vulnerability requires a pre-existing foothold to be effective. Regular security assessments of browser security implementations, particularly for device-specific APIs, should be conducted to identify similar policy enforcement gaps that could be exploited by adversaries.