CVE-2026-17814 in Chrome
Summary
by MITRE • 07/30/2026
Insufficient validation of untrusted input 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)
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Analysis
by VulDB Data Team • 07/30/2026
This vulnerability represents a critical flaw in chrome for ios navigation restriction enforcement mechanisms that could enable remote code execution through crafted html content. The issue stems from inadequate input validation within the browser's rendering engine where untrusted html content fails to properly validate user-supplied data before processing navigation commands. The vulnerability affects google chrome versions prior to 151.0.7922.72 on ios platforms and demonstrates a failure in the browser's security model to properly sanitize navigation-related attributes and javascript execution contexts.
The technical implementation of this flaw allows attackers to craft malicious html pages that can bypass intended navigation restrictions through improper input sanitization. When chrome for ios processes such crafted content, it fails to validate the legitimacy of navigation commands embedded within the html structure, potentially allowing execution of unauthorized navigation sequences. This vulnerability falls under the category of insufficient input validation as defined by cwe-20 and represents a classic example of how improper sanitization can lead to privilege escalation or unauthorized access patterns. The chromium security severity classification of medium indicates the potential for significant impact given that this affects mobile browser functionality and could enable malicious navigation sequences.
The operational impact of this vulnerability extends beyond simple navigation bypass as it creates potential attack vectors for more sophisticated exploitation techniques. Attackers could leverage this flaw to redirect users to malicious sites, inject unwanted content, or potentially execute unauthorized commands within the browser context. Mobile browsers represent a particularly sensitive target due to their limited sandboxing capabilities and the trust users place in native applications. This vulnerability could be exploited in phishing attacks where navigation restrictions are typically enforced to prevent malicious redirects, making it a significant concern for mobile security environments. The attack surface is further expanded by the fact that this affects a widely used browser on mobile platforms where users may not have additional security layers to protect against such navigation bypasses.
Mitigation strategies should focus on immediate patch deployment to all affected chrome for ios installations to ensure proper input validation mechanisms are re-enabled. Organizations should implement network-level protections including content filtering and web application firewalls to monitor and block suspicious navigation patterns. Browser security configurations should be reviewed to ensure that navigation restrictions are properly enforced even when processing untrusted content. Additional defensive measures include user education about recognizing potentially malicious navigation attempts and implementing multi-factor authentication for sensitive applications. The vulnerability highlights the importance of comprehensive input validation across all browser components and demonstrates how seemingly minor flaws in html processing can create significant security implications. Regular security assessments of mobile browser implementations should be conducted to identify similar validation gaps that could enable similar exploitation patterns.
This vulnerability aligns with several att&ck tactics including t1059 command and scripting interpreter and t1203 proxy execution patterns where attackers may attempt to bypass restrictions through crafted content. The remediation approach should incorporate defensive programming practices to ensure all user-supplied data undergoes proper validation before being processed by navigation systems. The incident underscores the need for robust security testing of mobile browser components and emphasizes that even minor input validation gaps can create significant security risks in mobile environments where users expect high levels of protection from malicious content.