CVE-2026-3930 is a security vulnerability identified in Google Chrome on iOS platforms prior to version 146.0.7680.71. The vulnerability arises from unsafe navigation handling within the browser, specifically allowing a remote attacker to bypass navigation restrictions by crafting a malicious HTML page. This issue is categorized under CWE-288, which relates to improper authentication or authorization mechanisms. The attack vector is remote network-based, requiring no privileges and no prior authentication, but does require user interaction, such as visiting a maliciously crafted webpage. The vulnerability impacts the integrity of the browser's navigation flow, potentially allowing attackers to redirect users to unintended or malicious destinations without proper authorization or user consent. Although confidentiality and availability are not directly compromised, the integrity breach can facilitate further attacks such as phishing, social engineering, or drive-by downloads. The vulnerability has a CVSS v3.1 base score of 6.5, indicating medium severity, with an attack vector of network, low attack complexity, no privileges required, user interaction required, unchanged scope, no confidentiality impact, high integrity impact, and no availability impact. As of the published date, no exploits have been reported in the wild. The issue was publicly disclosed on March 11, 2026, and users are advised to upgrade to Chrome version 146.0.7680.71 or later where the vulnerability is patched.

The primary impact of CVE-2026-3930 is on the integrity of user navigation within Google Chrome on iOS devices. Attackers exploiting this vulnerability can bypass navigation restrictions, potentially redirecting users to malicious or unintended websites without their consent. This can facilitate phishing attacks, malware distribution, or other social engineering exploits that rely on manipulating user navigation. While confidentiality and availability are not directly affected, the integrity compromise can lead to significant security risks, especially for organizations relying on Chrome on iOS for secure browsing or sensitive transactions. The requirement for user interaction limits automated exploitation but does not eliminate risk, as users may be tricked into visiting malicious pages. Organizations with large iOS user bases or those in sectors such as finance, healthcare, or government where secure browsing is critical may face increased risk. The absence of known exploits in the wild reduces immediate threat but does not preclude future attacks. Failure to patch could expose users to targeted or opportunistic attacks leveraging this vulnerability.

To mitigate CVE-2026-3930, organizations and users should promptly update Google Chrome on iOS devices to version 146.0.7680.71 or later, where the vulnerability has been addressed. Beyond patching, organizations should implement strict web content filtering and URL filtering to block access to known malicious sites and reduce exposure to crafted HTML pages designed to exploit navigation flaws. Employing mobile device management (MDM) solutions to enforce browser updates and restrict installation of unapproved browsers can further reduce risk. User education is critical: training users to recognize suspicious links and avoid clicking on untrusted URLs can limit successful exploitation. Additionally, monitoring network traffic for unusual redirection patterns or anomalous browsing behavior may help detect exploitation attempts. Organizations should also consider deploying endpoint protection solutions capable of detecting browser-based attacks and enforcing security policies on iOS devices. Regular vulnerability scanning and penetration testing focused on mobile browsers can help identify residual risks.