CVE-2026-106385 in Chrome
Summary
by MITRE • 10/07/2026
Race condition in Chromoting in Google Chrome prior to 155.0.8059.39 allowed a remote attacker leveraging social engineering to potentially bypass system access restrictions via crafted network traffic. (Chromium security severity: Low)
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Analysis
by VulDB Data Team • 10/07/2026
The vulnerability identified as a race condition within the Chromoting component of Google Chrome prior to version 155.0.8059.39 represents a subtle but significant flaw in how concurrent operations are handled during remote desktop sessions. Race conditions occur when software performs an operation out of sequence or at an unexpected time, often due to insufficient synchronization mechanisms between threads or processes. In the context of Chromoting, which facilitates screen sharing and remote control functionalities, this defect likely involves a timing gap where system access restrictions could be bypassed before they are fully enforced. The Chromium security team has classified this issue with a low severity rating, indicating that while the flaw is real and exploitable under specific conditions, it may require precise timing or complex setup to achieve successful exploitation compared to critical memory corruption vulnerabilities.
The operational impact of this vulnerability centers on the potential for unauthorized access to system resources through crafted network traffic. An attacker leveraging social engineering techniques can trick a user into initiating a Chromoting session with a malicious actor. Once the connection is established, the attacker sends specially constructed packets designed to exploit the race condition in the authentication or permission checking logic. By manipulating the timing of these requests relative to internal state changes within the browser process, an attacker might convince the system that certain access restrictions do not apply, thereby gaining elevated privileges or bypassing sandbox boundaries intended to isolate web content from the host operating system. This scenario highlights the risk associated with remote interaction features where trust is implicitly granted based on user consent rather than strict technical verification of every subsequent action.
From a threat modeling perspective, this vulnerability aligns closely with CWE-362, which describes concurrent execution race conditions leading to unintended state changes. The exploitation vector also relates to ATT&CK technique T1059, Command and Scripting Interpreter, as the bypass could allow an attacker to execute commands on the victim's machine under the context of the compromised browser process. Furthermore, it touches upon privilege escalation concepts found in CWE-269, Improper Privilege Management, because the core issue involves circumventing access controls that should restrict what actions a remote session can perform. The reliance on social engineering underscores the importance of user awareness alongside technical mitigations, as the initial foothold depends heavily on human interaction rather than purely automated network-based attacks.
Mitigation strategies primarily involve updating to Google Chrome version 155.0.8059.39 or later, where the race condition has been addressed through improved synchronization logic within the Chromoting module. Organizations should enforce strict update policies for all endpoints running Chromium-based browsers to ensure that such timing vulnerabilities are patched promptly. Additionally, users should be educated on the risks of accepting remote desktop connections from untrusted sources, as social engineering remains a primary vector for initiating these sessions. Implementing network segmentation and monitoring tools can also help detect anomalous traffic patterns associated with Chromoting exploits, providing an additional layer of defense in depth against potential exploitation attempts targeting this specific component flaw.