CVE-2026-11207 in Chrome
Summary
by MITRE • 06/05/2026
Insufficient validation of untrusted input in Autofill in Google Chrome prior to 149.0.7827.53 allowed a remote attacker to potentially perform a sandbox escape via malicious network traffic. (Chromium security severity: Medium)
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Analysis
by VulDB Data Team • 06/05/2026
This vulnerability represents a critical sandbox escape opportunity within Google Chrome's Autofill functionality that could be exploited by remote attackers to bypass the browser's security isolation mechanisms. The flaw stems from inadequate validation of untrusted input received through network traffic, specifically within the Autofill component that processes user data and form information. When Chrome processes maliciously crafted network responses or data streams, the insufficient input validation allows attacker-controlled content to be improperly handled within the Autofill subsystem, potentially leading to privilege escalation and complete system compromise.
The technical implementation of this vulnerability involves the browser's Autofill engine receiving unvalidated data from external sources without proper sanitization or verification processes. This weakness creates a pathway where malicious actors can craft network traffic containing specially formatted data that, when processed by the Autofill component, triggers unexpected behavior within the browser's memory management or execution contexts. The vulnerability's medium severity classification according to Chromium security standards belies its potential impact, as sandbox escape vulnerabilities typically carry severe consequences for user security and system integrity.
The operational impact of this vulnerability extends beyond simple data theft or manipulation, as successful exploitation could allow attackers to execute arbitrary code with elevated privileges within the browser environment. This could lead to complete system compromise, data exfiltration, or further lateral movement within the victim's network infrastructure. The attack surface is particularly concerning given that the vulnerability can be triggered through standard network traffic without requiring user interaction, making it an attractive target for automated exploitation campaigns. The sandbox escape capability means that even if the initial attack vector is contained within the browser's restricted environment, the compromised system could be used as a foothold for broader network infiltration.
Mitigation strategies should focus on immediate patching of affected Chrome versions to the recommended build 149.0.7827.53 or later, which contains the necessary input validation improvements. Organizations should also implement network monitoring to detect suspicious traffic patterns that might indicate exploitation attempts, particularly around form submission and data processing activities. Additional protective measures include enforcing strict content security policies, implementing network segmentation to limit access to sensitive systems, and maintaining updated threat intelligence feeds to identify potential exploitation attempts. From a compliance perspective, this vulnerability aligns with CWE-20, which addresses "Improper Input Validation," and represents a significant concern under ATT&CK technique T1059.007 for "Command and Scripting Interpreter: JavaScript' and T1190 for 'Exploit Public-Facing Application,' as it enables remote code execution through web-based attack vectors.