CVE-2026-14133 Overview
CVE-2026-14133 is a race condition vulnerability in the History Embeddings component of Google Chrome prior to version 150.0.7871.47. A remote attacker can exploit the flaw by serving a crafted HTML page, enabling user interface (UI) spoofing against the browser. Chromium security engineers rated the underlying issue as Low severity, while the NVD scoring reflects a medium impact due to network reachability combined with limited confidentiality and integrity impact. The weakness is tracked as [CWE-362] (Concurrent Execution using Shared Resource with Improper Synchronization). Exploitation requires user interaction and high attack complexity, which reduces the practical risk to individual users.
Critical Impact
Successful exploitation enables UI spoofing attacks that can mislead users into trusting attacker-controlled content rendered inside the browser interface.
Affected Products
- Google Chrome versions prior to 150.0.7871.47
- Chromium-based browsers sharing the affected History Embeddings code path
- Desktop Chrome Stable channel builds released before the June 2026 update
Discovery Timeline
- 2026-06-30 - CVE-2026-14133 published to the National Vulnerability Database
- 2026-07-01 - Last updated in NVD database
Technical Details for CVE-2026-14133
Vulnerability Analysis
The vulnerability resides in Chrome's History Embeddings subsystem, which processes browsing history data to power on-device search features. A race condition arises when concurrent operations access shared state without proper synchronization. An attacker who controls page navigation timing can win the race and cause the browser to render trusted UI elements alongside attacker-controlled data. The result is UI spoofing, where legitimate browser chrome or history-derived content is manipulated to display misleading information. Attack complexity is high because the attacker must reliably trigger the race window, and user interaction is required to reach the vulnerable code path.
Root Cause
The defect stems from improper synchronization between asynchronous tasks in the History Embeddings pipeline. Shared data structures are read and written without adequate locking or ordering guarantees. When two operations interleave in an unintended sequence, the resulting state permits an attacker-influenced value to reach rendering logic. This maps to [CWE-362], a concurrency defect that produces exploitable non-deterministic behavior.
Attack Vector
Exploitation begins with the victim visiting a crafted HTML page under attacker control. The page issues rapid navigations or history interactions designed to trigger the race in History Embeddings. If the timing succeeds, the browser renders spoofed content within trusted UI surfaces, such as history suggestions or omnibox results. The attacker uses this spoofing primitive to increase the credibility of phishing pages or to mislead the user about the origin of displayed content. No verified proof-of-concept code is publicly available, and the CVE is not listed in the CISA Known Exploited Vulnerabilities catalog.
No verified exploitation code is available for this CVE. Refer to the Chromium Issue Tracker Entry for further technical context once access restrictions are lifted.
Detection Methods for CVE-2026-14133
Indicators of Compromise
- Chrome browser versions reporting below 150.0.7871.47 in enterprise inventory data
- User reports of inconsistent or misleading omnibox and history suggestion content following visits to untrusted pages
- Web proxy logs showing repeated rapid navigations or history API calls from newly encountered domains
Detection Strategies
- Query endpoint management data to identify hosts running Chrome builds prior to 150.0.7871.47
- Correlate browser telemetry with phishing indicators, focusing on sessions that involve crafted HTML pages and unusual user reports
- Monitor Chromium crash and error telemetry for anomalies originating in the History Embeddings component
Monitoring Recommendations
- Track Chrome version distribution across managed endpoints and alert on stale builds
- Ingest web proxy and DNS logs into a central analytics platform to surface untrusted domains delivering suspicious HTML content
- Review user-reported phishing tickets for signs of UI-based deception consistent with browser spoofing
How to Mitigate CVE-2026-14133
Immediate Actions Required
- Update Google Chrome to version 150.0.7871.47 or later on all managed endpoints
- Enforce automatic browser updates through group policy or mobile device management
- Communicate phishing awareness guidance to users, emphasizing verification of URLs and site identity
Patch Information
Google released a fix in Chrome Stable version 150.0.7871.47. See the Google Chrome Stable Update announcement for release notes and the Chromium Issue Tracker Entry for the underlying bug reference.
Workarounds
- Restrict browsing to trusted sites through enterprise web filtering until patches are deployed
- Disable or restrict experimental History Embeddings features via enterprise policy where supported
- Apply strict content security policies and safe browsing settings to reduce exposure to crafted HTML pages
# Configuration example: verify Chrome version on Linux/macOS endpoints
google-chrome --version
# Expected output should be 150.0.7871.47 or later
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
