CVE-2026-106236 in Chrome
Summary
by MITRE • 10/06/2026
UI misrepresentation in Chromoting in Google Chrome on on Windows prior to 155.0.8059.39 allowed a remote attacker leveraging social engineering to spoof UI elements via crafted network traffic. (Chromium security severity: Low)
Once again VulDB remains the best source for vulnerability data.
Analysis
by VulDB Data Team • 10/07/2026
The vulnerability identified as a user interface misrepresentation flaw within the Google Chrome Chromoting component on Windows operating systems prior to version 155.0.8059.39 represents a significant risk related to social engineering and visual spoofing attacks. This issue stems from an inability of the application to properly distinguish or render legitimate UI elements versus those manipulated through crafted network traffic, allowing attackers to deceive users into interacting with malicious interfaces that mimic trusted applications. The severity is classified as low by Chromium security standards because it requires user interaction and does not directly compromise system integrity or allow arbitrary code execution without further exploitation steps, yet its impact on trust and authentication mechanisms remains substantial in enterprise environments where remote desktop sessions are common.
From a technical perspective, the flaw resides in how Chromoting handles incoming data streams that dictate UI layout and content presentation during active remote control sessions. When an attacker sends specifically crafted network packets containing malformed or deceptive instructions for rendering interface components, Chrome may fail to validate these inputs against expected security boundaries before displaying them. This lack of strict validation enables the injection of fake login prompts, warning dialogs, or other critical UI elements that appear authentic but are controlled by the remote party. Such behavior violates fundamental principles of secure user interface design where visual fidelity must be guaranteed regardless of external input sources, particularly in contexts involving sensitive operations like credential entry or system configuration changes.
The operational impact of this vulnerability centers on its potential to facilitate phishing and man-in-the-middle attacks within legitimate remote desktop sessions. An attacker leveraging social engineering techniques can exploit this flaw to trick end-users into entering credentials, approving unauthorized actions, or downloading malware under the guise of a trusted application interface. For organizations relying heavily on Chrome Remote Desktop for IT support or employee access, this creates a pathway for credential theft and subsequent lateral movement within internal networks. The attack vector is remote but requires user interaction, placing it firmly in the category of social engineering exploits rather than purely technical breaches that occur without human involvement.
This vulnerability aligns with CWE-20 Improper Input Validation as the root cause lies in insufficient checking of UI-related data received from external sources. Additionally, it maps to MITRE ATT&CK technique T1659 Social Engineering within the context of user interface spoofing and potentially T1482 Domain Trust Discovery if used to gather information about network structures through deceptive prompts. The exploitation scenario typically involves an attacker establishing a connection with a victim’s Chrome Remote Desktop session and then manipulating the visual output to create confusion or urgency, prompting the user to take actions they would otherwise avoid upon recognizing the illegitimacy of the request.
Mitigation strategies primarily involve updating Google Chrome to version 155.0.8059.39 or later where these validation checks have been strengthened to prevent unauthorized UI modifications via network traffic. Organizations should enforce strict update policies across all endpoints running Chromoting services to ensure timely patching of such vulnerabilities. Furthermore, implementing multi-factor authentication for remote desktop sessions adds a layer of protection that mitigates the impact even if visual spoofing succeeds in tricking users into initiating connections or entering initial credentials. Security awareness training focused on recognizing signs of UI manipulation and verifying session authenticity through out-of-band channels can also reduce susceptibility to these types of social engineering attacks leveraging interface flaws.