CVE-2026-106316: Google Chrome UI Misrepresentation Vulnerability

CVE-2026-106316 Overview

CVE-2026-106316 is a user interface (UI) misrepresentation vulnerability in the Chromoting component of Google Chrome on macOS. The flaw affects Chrome versions prior to 155.0.8059.39. A remote attacker can leverage social engineering to spoof UI elements by delivering crafted network traffic to a victim running the Chromoting feature. The weakness is classified under CWE-451: User Interface (UI) Misrepresentation of Critical Information. Google's Chromium team rated the internal severity as Low, while the public CVSS assessment places it in the medium range due to the network attack vector and the requirement for user interaction.

Critical Impact
Remote attackers can spoof trusted UI elements in Chrome's Chromoting (remote desktop) interface on macOS, enabling phishing-style deception that may lead to credential disclosure or unintended user actions.

Affected Products

Google Chrome on macOS prior to version 155.0.8059.39
Apple macOS hosts running vulnerable Chrome builds
Chrome Remote Desktop (Chromoting) component

Discovery Timeline

2026-10-06 - CVE-2026-106316 published to the National Vulnerability Database (NVD)
2026-10-07 - Last updated in NVD database
2026-10-06 - Google published a Chrome Stable Channel Update addressing the issue

Technical Details for CVE-2026-106316

Vulnerability Analysis

The vulnerability resides in Chromoting, the backend component powering Chrome Remote Desktop. On macOS, Chromoting renders UI elements that convey session state, connection trust, and permission prompts. An attacker who can influence the network traffic reaching a Chromoting session can craft messages that cause the client to render misleading UI content. The user believes they are interacting with a legitimate Chrome dialog or Chromoting session indicator when they are not.

This class of flaw does not grant direct code execution or memory corruption. Instead, it undermines the integrity of the trust signals that users rely on when granting remote access or entering credentials. Exploitation requires user interaction, which is why social engineering is central to the attack chain.

Root Cause

The root cause is improper validation or sanitization of attacker-controlled content before rendering it in Chromoting UI surfaces on macOS. Chromium categorizes this behavior under CWE-451, where critical information is presented to the user in a misleading way. Technical specifics are tracked in Chromium Issue #554556423, which remains access-controlled pending broad patch adoption.

Attack Vector

An attacker reaches the vulnerable code path over the network. The adversary must first lure a target into initiating or accepting a Chromoting-related interaction. The attacker then supplies crafted network traffic that the Chromoting client renders as a spoofed UI element. Successful spoofing can trick users into approving connections, revealing credentials, or performing other actions they would otherwise refuse. No elevated privileges are required on the victim host.

No public proof-of-concept exploit is available at the time of publication, and the vulnerability is not listed on the CISA Known Exploited Vulnerabilities (KEV) catalog.

Detection Methods for CVE-2026-106316

Indicators of Compromise

Chrome processes on macOS running versions below 155.0.8059.39 with active Chromoting sessions.
Unexpected inbound or outbound Chromoting (remoting_host, remoting_me2me_host) network connections from untrusted peers.
User reports of unusual Chrome Remote Desktop prompts or dialogs that do not match expected workflows.

Detection Strategies

Inventory macOS endpoints to identify Chrome versions below 155.0.8059.39 using endpoint management or EDR telemetry.
Correlate Chromoting process execution with network connections to non-corporate relay endpoints.
Monitor for anomalous launches of the Chrome Remote Desktop host binary outside sanctioned IT workflows.

Monitoring Recommendations

Enable browser version telemetry and alert on macOS fleets that lag the latest Chrome Stable channel release.
Capture DNS and TLS SNI logs for remotedesktop.google.com and related Chromoting infrastructure to baseline normal use.
Track user-reported phishing or social engineering attempts referencing Chrome Remote Desktop prompts.

How to Mitigate CVE-2026-106316

Immediate Actions Required

Update Google Chrome on all macOS endpoints to version 155.0.8059.39 or later.
Restart Chrome after the update completes to ensure the Chromoting component is reloaded.
Communicate with users about the risk of unexpected Chrome Remote Desktop prompts and reinforce verification steps.

Patch Information

Google addressed CVE-2026-106316 in the Chrome Stable channel update documented in the Chrome Releases blog. Administrators should deploy Chrome 155.0.8059.39 or newer through managed update channels such as Google Chrome Enterprise, Jamf, or Munki. Verify installed versions via chrome://version or endpoint management reporting.

Workarounds

Disable or uninstall Chrome Remote Desktop on macOS endpoints that do not require remote access functionality.
Restrict Chromoting usage through enterprise policy using the RemoteAccessHostFirewallTraversal and related Chrome policies.
Train users to validate Chrome Remote Desktop prompts out-of-band before approving sessions or entering credentials.

bash

# Verify installed Chrome version on macOS
/Applications/Google\ Chrome.app/Contents/MacOS/Google\ Chrome --version

# Example Jamf policy snippet to enforce minimum Chrome version
sudo defaults write com.google.Chrome RemoteAccessHostFirewallTraversal -bool false
sudo defaults write com.google.Chrome RemoteAccessHostAllowRemoteAccessConnections -bool false