CVE-2026-106308 in Chrome
Summary
by MITRE • 10/06/2026
Incorrect reference resolution in Autofill in Google Chrome on on Android prior to 155.0.8059.39 allowed a remote attacker leveraging social engineering to obtain sensitive information via a crafted HTML page. (Chromium security severity: High)
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Analysis
by VulDB Data Team • 10/07/2026
The vulnerability identified as an incorrect reference resolution within the Autofill functionality of Google Chrome on Android represents a significant risk to user privacy and data integrity. This flaw, present in versions prior to 155.0.8059.39, stems from how the browser handles internal references when processing autofill suggestions or form submissions. Specifically, the engine fails to correctly validate or resolve object references during the interaction between web pages and the local autofill database. This technical deficiency allows a malicious actor to manipulate the context in which sensitive data is retrieved or displayed, leading to unintended information disclosure. The severity of this issue is classified as High by Chromium security standards due to its potential for widespread impact on mobile users who rely heavily on automated form filling for convenience and efficiency.
From an operational perspective, this vulnerability enables a remote attacker to exploit social engineering tactics to trick victims into visiting a specially crafted HTML page. When the victim interacts with forms on such pages, or even when the browser attempts to auto-complete fields based on stored credentials or personal details, the flawed reference resolution logic can be triggered. This allows the attacker to extract sensitive information that was not intended for public view or cross-site access. The attack vector is primarily remote and requires user interaction, typically involving clicking a link or loading a malicious webpage designed to exploit this specific browser behavior. The success of the exploitation relies on convincing the user to engage with content hosted by an adversary, making social engineering a critical component of the attack chain.
This incident aligns closely with CWE-200, which categorizes information exposure vulnerabilities where sensitive data is disclosed without proper authorization or access controls. Furthermore, it relates to CWE-798, involving the use of hardcoded credentials or improper handling of authentication mechanisms if the autofill system exposes stored passwords incorrectly. In terms of offensive security frameworks, this vulnerability supports techniques found in MITRE ATT&CK ID T1056, which covers input capture methods such as keylogging and form harvesting. By exploiting the browser's own features for data entry assistance, attackers can bypass traditional perimeter defenses that do not monitor client-side application logic flaws. The ability to harvest autofill data effectively compromises the confidentiality of user profiles, including names, addresses, phone numbers, and potentially financial information if credit card details are stored in the profile.
Mitigation strategies must focus on both immediate patching and long-term defensive coding practices. Users should immediately update Google Chrome on their Android devices to version 155.0.8059.39 or later, as this release contains the necessary fixes for the reference resolution logic within the autofill module. For organizations managing fleets of mobile devices, enforcing automatic browser updates through Mobile Device Management (MDM) solutions is crucial to ensure rapid remediation across all endpoints. Additionally, security awareness training should emphasize the risks of interacting with untrusted web content, particularly forms that request personal information, as social engineering remains a primary delivery mechanism for this type of exploit. Developers and security engineers reviewing similar browser components should implement stricter input validation and reference checking mechanisms to prevent future instances where internal object states can be manipulated by external inputs. Regular penetration testing focused on client-side data handling will also help identify analogous weaknesses before they can be exploited in the wild.