CVE-2026-14055 Overview
CVE-2026-14055 is an input validation vulnerability in the Device Trust component of Google Chrome on Windows. Versions prior to 150.0.7871.47 fail to properly validate untrusted input, enabling an attacker who has already compromised the renderer process to attempt a sandbox escape. Exploitation requires a crafted HTML page and user interaction. A successful sandbox escape moves attacker code from the constrained renderer into a higher-privileged Chrome process on the host. The weakness is classified under [CWE-20: Improper Input Validation].
Critical Impact
An attacker chaining a renderer compromise with CVE-2026-14055 can escape the Chrome sandbox on Windows and execute code outside the renderer boundary.
Affected Products
- Google Chrome on Windows prior to 150.0.7871.47
- Microsoft Windows hosts running vulnerable Chrome builds
- Chromium-derived browsers on Windows that share the Device Trust component
Discovery Timeline
- 2026-06-30 - CVE-2026-14055 published to NVD
- 2026-07-01 - Last updated in NVD database
Technical Details for CVE-2026-14055
Vulnerability Analysis
The defect resides in the Device Trust component in Chrome on Windows. Device Trust handles signals used to attest the state of a managed endpoint and interacts with higher-privileged browser code. Insufficient validation of input reaching this component allows a compromised renderer to send data the component treats as trusted. Because the renderer already runs attacker code after an initial exploit, the flaw provides the pivot needed to escape the Chromium sandbox. The exploitation chain requires user interaction, such as visiting a crafted HTML page, and originates from the network attack surface.
Root Cause
The root cause is improper input validation ([CWE-20]) inside the Device Trust code path. Data received from a lower-privileged process is consumed without the checks needed to enforce the sandbox boundary. Google classifies the Chromium security severity of the underlying issue as Low, but the composed impact when chained with a renderer compromise is a sandbox escape.
Attack Vector
Exploitation is a two-stage process. The attacker first serves a crafted HTML page that compromises the renderer process, typically through a separate memory safety or logic bug. The attacker then abuses the Device Trust input path from the renderer to reach code executing outside the sandbox on the Windows host. Refer to the Chromium Issue Tracker Entry and the Google Chrome Desktop Update for vendor detail.
// No verified proof-of-concept code is publicly available for CVE-2026-14055.
// See the Chromium issue tracker for restricted technical details.
Detection Methods for CVE-2026-14055
Indicators of Compromise
- Chrome child processes on Windows spawning unexpected executables such as cmd.exe, powershell.exe, or rundll32.exe from a chrome.exe parent
- Renderer processes writing to sensitive user or system paths outside the standard Chrome profile directories
- Outbound connections from Chrome-hosted processes to newly registered or low-reputation domains after a crafted page load
Detection Strategies
- Alert on anomalous parent-child relationships involving chrome.exe and native Windows binaries typically associated with post-exploitation.
- Correlate browser-initiated file writes and registry modifications with recent navigation events to identify sandbox escape behavior.
- Inventory installed Chrome versions across the fleet and flag any build below 150.0.7871.47 on Windows endpoints.
Monitoring Recommendations
- Ingest Windows process, file, and network telemetry into a centralized analytics platform to enable cross-signal detection of renderer-to-host escapes.
- Monitor Chrome enterprise reporting events tied to Device Trust and endpoint verification for unexpected failures or malformed signals.
- Track EPSS movement for CVE-2026-14055 and adjust prioritization if exploit likelihood increases.
How to Mitigate CVE-2026-14055
Immediate Actions Required
- Update Google Chrome on all Windows endpoints to version 150.0.7871.47 or later.
- Force-restart Chrome after deployment so patched binaries replace running processes.
- Audit managed browser policies to confirm automatic updates are enabled and not blocked by group policy.
Patch Information
Google addressed CVE-2026-14055 in the Chrome Stable channel release documented in the Google Chrome Desktop Update. Windows users must be on 150.0.7871.47 or later. Enterprises managing Chrome through Google Admin console or Group Policy should validate rollout status and target any endpoints stuck on prior versions.
Workarounds
- Restrict browsing to trusted sites through enterprise URL allowlists until patches are deployed.
- Enforce site isolation and disable unnecessary Chrome extensions that expand renderer attack surface.
- Apply application control policies on Windows to block Chrome child processes from launching scripting hosts and shells.
# Verify installed Chrome version on Windows via PowerShell
(Get-Item "C:\Program Files\Google\Chrome\Application\chrome.exe").VersionInfo.ProductVersion
# Trigger managed update through Google Update on the endpoint
& "C:\Program Files (x86)\Google\Update\GoogleUpdate.exe" /ua /installsource scheduler
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
