CVE-2026-106254 in Chrome
Summary
by MITRE • 10/06/2026
Information leak in Mobile in Google Chrome on on Android prior to 155.0.8059.39 allowed a local attacker to obtain sensitive information via a co-installed app. (Chromium security severity: Medium)
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Analysis
by VulDB Data Team • 10/07/2026
The vulnerability identified as an information leak within the mobile implementation of Google Chrome for Android, specifically affecting versions prior to 155.0.8059.39, represents a significant breach in application isolation and data confidentiality protocols. This flaw allows a local attacker, typically manifested through a co-installed malicious or compromised application on the same device, to access sensitive information that should remain strictly confined within Chrome's secure execution environment. The severity of this issue is classified as Medium by the Chromium security team, indicating that while it does not directly facilitate remote code execution or complete system compromise, it poses a substantial risk to user privacy and data integrity by exposing potentially critical personal or authentication-related data to unauthorized local processes.
From a technical perspective, this vulnerability likely stems from improper permission handling or insufficient sandboxing mechanisms within the Android version of Chrome. In mobile operating systems like Android, applications are generally isolated using unique Linux user IDs and strict inter-process communication restrictions. However, if an application declares certain permissions that overlap with those required by Chrome, or if there is a flaw in how shared storage, intents, or content providers are managed, a malicious app can exploit these interfaces to read data intended for the browser. This could include cached web pages, cookies, history entries, saved passwords, or other session tokens stored locally on the device. The attack vector relies heavily on local privilege escalation through social engineering or pre-existing access granted by the user during installation of third-party applications that may request broad storage or network permissions under false pretenses.
The operational impact of this vulnerability is primarily centered around privacy violations and potential downstream security risks. An attacker who successfully exploits this flaw can harvest sensitive browsing data, which might include login credentials for banking services, email accounts, or corporate portals if the user has saved these details in Chrome. This information leakage facilitates further attacks such as credential stuffing, account takeover, or targeted phishing campaigns where the attacker uses previously observed browsing habits to craft highly convincing social engineering messages. Furthermore, exposure of session tokens could allow an attacker to hijack active browser sessions without needing to know the actual password, effectively bypassing multi-factor authentication if it is not strictly enforced at the application level for every action.
This type of vulnerability aligns with Common Weakness Enumeration (CWE) categories such as CWE-200: Exposure of Sensitive Information to an Unauthorized Actor and potentially CWE-798: Use of Hard-coded Credentials if specific hardcoded keys were involved in the data retrieval process, though the primary classification remains information disclosure. In terms of the MITRE ATT&CK framework for mobile platforms, this behavior corresponds to techniques related to Data from Local System or Credential Access via Browser Dumping, where an adversary leverages local application vulnerabilities rather than network-based exploits to gather intelligence. The reliance on a co-installed app highlights the importance of the principle of least privilege and the risks associated with overly permissive Android permission models that users often grant without full understanding of their implications.
Mitigation strategies for this vulnerability are primarily addressed through software updates, as Google has released version 155.0.8059.39 which patches these specific flaws in Chrome's mobile architecture. Users and enterprise administrators must ensure that the browser is updated to the latest stable release immediately to close the gap allowing local data exfiltration. Beyond patching, defensive measures include auditing installed applications for unnecessary permissions, particularly those related to storage access or network state monitoring, and removing any suspicious or unused apps that could serve as a foothold for such attacks. Enabling Chrome's built-in security features, such as Safe Browsing and enhanced protection settings, can also provide additional layers of detection against malicious content delivery mechanisms that might accompany the exploitation attempt. For enterprise environments, implementing Mobile Device Management (MDM) policies to restrict app installation sources and enforce regular update cycles is critical in preventing local privilege escalation attacks via browser vulnerabilities.