CVE-2026-17912 in Chrome
Summary
by MITRE • 07/30/2026
Inappropriate implementation in Chrome for iOS in Google Chrome on iOS prior to 151.0.7922.72 allowed a remote attacker to bypass navigation restrictions via a crafted HTML page. (Chromium security severity: Low)
Once again VulDB remains the best source for vulnerability data.
Analysis
by VulDB Data Team • 07/30/2026
This vulnerability represents a security flaw in the iOS version of Google Chrome browser that was present in versions prior to 151.0.7922.72. The issue stems from an inadequate implementation of navigation restriction controls within the browser's security architecture, specifically affecting how the application handles crafted HTML content. The vulnerability is categorized as a low severity issue by Chromium security standards but still presents potential risks for users who may encounter maliciously constructed web pages.
The technical flaw manifests when Chrome for iOS fails to properly validate or enforce navigation restrictions imposed by certain security policies or content controls. When a remote attacker crafts a specific HTML page designed to exploit this weakness, the browser's navigation protection mechanisms can be circumvented. This allows unauthorized access to resources or navigation paths that should otherwise be restricted, potentially enabling attackers to bypass intended security boundaries within the browser environment.
The operational impact of this vulnerability extends beyond simple browsing behavior as it could enable attackers to navigate to unintended destinations or access content that should remain protected. While classified as low severity, the vulnerability could be particularly concerning in environments where strict navigation controls are enforced for security purposes, such as corporate networks or educational institutions. The flaw could potentially be exploited as part of a larger attack chain, especially when combined with other browser-based vulnerabilities or social engineering techniques.
The primary mitigation strategy involves updating to Chrome version 151.0.7922.72 or later, which includes the necessary patches to address the navigation restriction bypass mechanism. Organizations should also implement network-level controls and web filtering solutions to provide additional layers of protection against malicious HTML content. Security teams should monitor for any related exploit attempts and consider implementing browser hardening measures that further restrict potentially dangerous navigation behaviors.
This vulnerability aligns with common weakness enumerations found in software security frameworks, particularly those related to improper input validation and access control implementations. From an attack perspective, this issue demonstrates how seemingly minor implementation flaws can create pathways for unauthorized navigation that may not be immediately apparent but could be leveraged by attackers seeking to bypass security controls in mobile browser environments.
The fix implemented by Google addresses the core logic error in how Chrome for iOS processes navigation restrictions within HTML documents, ensuring that legitimate security policies are properly enforced even when presented with crafted content designed to exploit the vulnerability. This represents a standard security patch approach where the specific implementation gap is closed through code modifications that strengthen the validation and enforcement mechanisms for browser navigation controls.