CVE-2026-17830 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: Medium)
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Analysis
by VulDB Data Team • 07/30/2026
This vulnerability represents a critical flaw in the browser's navigation restriction implementation specifically affecting Google Chrome for iOS versions prior to 151.0.7922.72. The issue stems from an inadequate validation mechanism that fails to properly enforce security boundaries when processing crafted HTML content, creating a pathway for remote attackers to circumvent intended browsing restrictions. The vulnerability manifests through improper handling of navigation controls within the browser's rendering engine, allowing malicious actors to execute unauthorized navigational actions that should have been blocked by the security framework. This weakness directly impacts the browser's ability to maintain secure browsing contexts and can enable various attack vectors including phishing attempts, unauthorized redirects, and potential data exfiltration through manipulated navigation sequences.
The technical implementation flaw occurs within Chrome's iOS-specific security controls where navigation restrictions are not properly validated against malicious input. Attackers can craft HTML pages containing specific elements or attributes that exploit gaps in the validation logic, effectively bypassing the intended protection mechanisms. This vulnerability operates at the intersection of browser security policies and HTML rendering behavior, where the application fails to distinguish between legitimate and malicious navigation triggers. The medium severity classification reflects the potential for remote code execution through manipulation of navigation flows and the ability to circumvent user consent requirements that should normally govern such interactions. According to CWE standards, this represents a weakness in input validation and access control mechanisms, specifically categorized under improper input validation and security policy enforcement failures.
The operational impact of this vulnerability extends beyond simple navigation bypasses to potentially compromise user security across multiple attack scenarios. Users operating vulnerable versions of Chrome for iOS face risks including unauthorized access to restricted content, forced navigation to malicious websites, and potential exposure to additional attacks through the bypassed security controls. The vulnerability affects users who rely on Chrome's security features for protected browsing sessions, particularly in enterprise environments where navigation restrictions are enforced to prevent access to specific domains or content types. Attackers can leverage this weakness to create persistent threats that exploit the gap in browser security, potentially leading to credential theft, data loss, or further exploitation through chained attacks that build upon the initial navigation bypass.
Organizations and users should immediately update to Chrome version 151.0.7922.72 or later to remediate this vulnerability, as the update includes patches that address the input validation gaps in navigation restriction enforcement. Security teams should implement monitoring for suspicious navigation patterns and consider temporary restrictions on potentially malicious domains until full patch deployment occurs. The vulnerability demonstrates the importance of comprehensive security testing across platform-specific implementations, particularly in mobile browsers where user interaction patterns differ significantly from desktop environments. Network administrators should review existing security policies to ensure that browser updates are prioritized and deployed promptly, as this type of vulnerability can be exploited rapidly in active threat campaigns. Implementation of additional monitoring controls for navigation behavior anomalies and regular security assessments of mobile browser configurations will help mitigate the risk of exploitation. This case highlights the necessity of continuous security validation across all browser components, particularly those handling user interaction and navigation flows that form critical security boundaries in modern web applications.