CVE-2026-106414 in Chrome
Summary
by MITRE • 10/07/2026
Improper input validation in Mobile in Google Chrome on on iOS prior to 155.0.8059.39 allowed a remote attacker leveraging social engineering to potentially execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: Medium)
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Analysis
by VulDB Data Team • 10/07/2026
The vulnerability identified as an improper input validation flaw within Google Chrome for iOS prior to version 155.0.8059.39 represents a significant breach in the browser's boundary enforcement mechanisms. This issue stems from insufficient sanitization or type-checking of user-supplied data during the parsing and execution phases of web content processing. When a remote attacker constructs a malicious HTML page containing specifically crafted inputs, they can exploit this lack of validation to bypass expected constraints imposed by the application logic. The severity is classified as medium within the Chromium security framework, indicating that while exploitation requires specific conditions, the potential consequences are substantial enough to warrant immediate attention and patching.
The operational impact of this vulnerability centers on the ability of an attacker to execute arbitrary code outside the browser's sandbox environment. Modern browsers rely heavily on sandboxing techniques to isolate web content from the underlying operating system and other applications, thereby limiting the damage a compromised webpage can inflict. By leveraging social engineering tactics, such as deceiving a user into visiting a malicious site or opening a crafted link, an attacker can trigger this input validation failure. Once triggered, the flaw allows code execution that escapes these protective boundaries, potentially granting the attacker access to sensitive data stored on the device, control over application behavior, or further lateral movement within the mobile ecosystem.
From a classification perspective, this vulnerability aligns with CWE-20 Improper Input Validation and CWE-78 OS Command Injection principles, depending on how the arbitrary code is executed. The attack vector falls under MITRE ATT&CK technique T1189 Drive-by Compromise, where users are lured to malicious websites without direct interaction beyond visiting the page or clicking a link. Additionally, it relates to T1059 Command and Scripting Interpreter if the execution involves scripting languages available on iOS. The reliance on social engineering highlights that while technical controls were bypassed, human factors remain a critical component of the attack chain, emphasizing the need for both software fixes and user awareness training.
Mitigation strategies must prioritize immediate updates to Google Chrome for iOS version 155.0.8059.39 or later, which addresses the underlying input validation logic. Developers should implement strict allow-listing approaches for all inputs processed by the browser engine, ensuring that only expected data types and formats are accepted. Furthermore, defense-in-depth measures such as enabling Content Security Policy headers on web servers can help mitigate the impact of successful exploits by restricting resource loading and script execution contexts. Regular security audits focusing on input handling routines in mobile browsers will also reduce the risk of similar vulnerabilities emerging in future releases.