CVE-2026-17944 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)
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Analysis
by VulDB Data Team • 07/30/2026
This vulnerability represents a navigation restriction bypass issue within the Chrome for iOS browser implementation that could potentially allow remote attackers to circumvent intended security controls through carefully crafted web content. The flaw existed in versions prior to 151.0.7922.72 and specifically affected the iOS platform implementation of Google Chrome, which operates under different security constraints compared to the desktop version due to iOS's sandboxing mechanisms and app store approval processes.
The technical nature of this vulnerability stems from an inappropriate implementation within Chrome's iOS codebase that fails to properly validate or enforce navigation restrictions when processing maliciously crafted HTML content. This type of flaw typically occurs when browser implementations do not adequately sanitize user input or when security boundaries are improperly enforced during page rendering and navigation handling. The vulnerability is categorized as low severity by Chromium security standards, indicating it does not directly lead to privilege escalation, code execution, or data breach scenarios, but rather represents a bypass of intended access controls.
The operational impact of this vulnerability allows remote attackers to potentially navigate users to unintended destinations without proper authorization or warning mechanisms that should normally be in place. This could enable phishing attacks, malicious redirections, or other social engineering exploits where users might be tricked into visiting harmful websites. The attack vector requires the victim to visit a crafted HTML page, making it a client-side vulnerability that relies on user interaction and trust in the visited website. Such bypasses can be particularly concerning in enterprise environments where navigation restrictions are implemented to prevent access to certain categories of websites.
This vulnerability aligns with CWE-693, which covers protection mechanism failures, specifically related to inadequate enforcement of access control mechanisms. The implementation issues likely stem from insufficient validation of navigation events or improper handling of user-initiated navigation requests within the iOS-specific browser engine. From an ATT&CK perspective, this maps to technique T1071.001 for application layer protocol: web protocols, and potentially T1566 for phishing attacks that could be facilitated through this navigation bypass.
Mitigation strategies should focus on immediate patching of affected Chrome for iOS versions to the recommended build 151.0.7922.72 or later, which would contain the necessary fixes for the navigation restriction enforcement mechanisms. Organizations should also consider implementing additional network-level controls such as web proxies with content filtering capabilities, DNS-based filtering solutions, and browser security extensions that can provide additional layers of protection beyond what the browser itself provides. Regular security assessments of mobile browser implementations should be conducted to identify similar implementation gaps that could lead to navigation or access control bypasses.