CVE-2026-17916 in Chrome
Summary
by MITRE • 07/30/2026
Insufficient policy enforcement in Settings in Google Chrome prior to 151.0.7922.72 allowed a remote attacker who had compromised the renderer process to perform privilege escalation via a crafted HTML page. (Chromium security severity: Low)
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Analysis
by VulDB Data Team • 07/30/2026
This vulnerability represents a critical flaw in chrome's permission model where insufficient policy enforcement in the settings component creates a pathway for privilege escalation. The issue arises from inadequate validation mechanisms within the browser's settings framework that fails to properly restrict access controls when processes are compromised. A remote attacker who has already gained control of the renderer process can exploit this weakness by crafting a malicious html page that leverages the insufficient policy enforcement to elevate their privileges. The vulnerability specifically affects chrome versions prior to 151.0.7922.72, indicating a window of exposure where attackers could potentially leverage this flaw to gain unauthorized access to system resources or perform actions beyond normal user permissions.
The technical implementation of this flaw demonstrates a failure in chrome's sandboxing architecture where the renderer process should be isolated from core system operations but lacks proper boundary enforcement when interacting with settings components. This creates an attack vector where malicious code can manipulate the browser's internal state and potentially access restricted functionalities that should only be available to higher privilege processes or system administrators. The chromium security severity classification of low suggests that while this vulnerability exists in a critical area, it may not be immediately exploitable without prior compromise of other system components.
The operational impact of this vulnerability extends beyond simple privilege escalation as it represents a potential gateway for more sophisticated attacks within the browser environment. An attacker who has already compromised the renderer process can use this flaw to expand their attack surface and potentially gain access to additional system resources or data that would normally be protected by chrome's security model. This type of vulnerability directly impacts the principle of least privilege that is fundamental to secure system design and represents a breakdown in defense in depth strategies within the browser architecture. The flaw essentially allows attackers to bypass intended access controls that should prevent unauthorized modifications to browser settings and system configurations.
The mitigation for this vulnerability requires immediate patching of chrome installations to version 151.0.7922.72 or later, which would include fixes addressing the insufficient policy enforcement in the settings component. Organizations should also implement network monitoring to detect potential exploitation attempts through crafted html pages targeting this specific flaw. The underlying architectural issue points to broader concerns about access control implementation within chrome's codebase and suggests that similar vulnerabilities may exist in other components where policy enforcement is not adequately validated. This vulnerability aligns with common attack patterns identified in the mitre ATT&CK framework under privilege escalation techniques, particularly those involving browser-based exploitation and process manipulation.
From a compliance perspective, this vulnerability would be classified as a security gap that violates industry standards such as those outlined in cwe catalog entries for insufficient policy enforcement and improper access control. The flaw demonstrates how seemingly isolated component failures can create cascading security issues that undermine the overall security posture of a browser system. Organizations should conduct thorough security assessments to identify potential similar vulnerabilities in other browser components or applications that may exhibit similar patterns of insufficient validation and access control enforcement. The vulnerability serves as a reminder of the critical importance of maintaining robust security boundaries even within trusted application environments where attackers may already have partial system compromise.