CVE-2026-19152 in Chrome
Summary
by MITRE • 08/07/2026
Insufficient policy enforcement in Navigation in Google Chrome prior to 151.0.7922.109 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: High)
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Analysis
by VulDB Data Team • 08/07/2026
This vulnerability represents a critical sandbox escape flaw in Google Chrome's navigation handling mechanisms that existed prior to version 151.0.7922.109. The issue stems from insufficient policy enforcement within the browser's navigation system, creating a pathway for remote attackers who have already gained control of the renderer process to bypass security boundaries. The vulnerability is classified as high severity by Chromium security standards and demonstrates a fundamental weakness in the browser's privilege separation model.
The technical flaw manifests when a malicious HTML page is loaded that exploits improper validation of navigation requests within the renderer process. Under normal circumstances, Chrome's sandbox architecture isolates renderer processes from system-level operations to prevent unauthorized access to sensitive resources. However, this vulnerability allows an attacker with compromised renderer privileges to manipulate navigation decisions in ways that violate established security policies. The flaw specifically affects how the browser enforces access controls during navigation operations, potentially permitting escalation of privileges beyond the intended sandbox boundaries.
The operational impact of this vulnerability extends beyond simple privilege escalation as it represents a complete breakdown in Chrome's security model. Attackers who have already compromised a renderer process can leverage this flaw to gain broader system access, potentially enabling them to read arbitrary files, execute code with elevated privileges, or bypass other security controls. This type of sandbox escape is particularly dangerous because it occurs after an initial compromise has already been achieved, making it more difficult for security systems to detect and prevent. The vulnerability affects the core navigation functionality that is critical to browser operations, meaning any page could potentially be used to exploit this weakness.
This vulnerability maps directly to CWE-284 Access Control Issues and aligns with ATT&CK techniques related to privilege escalation and sandbox evasion. The flaw demonstrates how insufficient policy enforcement in system components can create cascading security failures. Organizations should prioritize immediate patching to version 151.0.7922.109 or later, as the vulnerability provides attackers with a direct path to bypass critical security boundaries. Additional mitigations include implementing network-level controls to restrict access to potentially malicious content and monitoring for anomalous navigation patterns that might indicate exploitation attempts. Security teams should also consider deploying browser hardening measures such as disabling unnecessary browser features and implementing strict content security policies to reduce the attack surface available to potential exploitants.