CVE-2026-7947 Overview
CVE-2026-7947 is a user interface (UI) spoofing vulnerability in the Network component of Google Chrome prior to version 148.0.7778.96. The flaw stems from insufficient validation of untrusted input [CWE-20]. A remote attacker who has already compromised the renderer process can deliver a crafted HTML page that manipulates browser UI elements to mislead the user. Chromium classifies the security severity as Medium. The issue affects Chrome on Windows, macOS, and Linux desktop platforms.
Critical Impact
Attackers chaining a renderer compromise with this flaw can spoof trusted browser UI to facilitate credential theft, phishing, or further social engineering against users running Chrome below 148.0.7778.96.
Affected Products
- Google Chrome prior to 148.0.7778.96
- Chrome desktop builds for Microsoft Windows
- Chrome desktop builds for Apple macOS and Linux
Discovery Timeline
- 2026-05-06 - CVE-2026-7947 published to NVD
- 2026-05-06 - Last updated in NVD database
- 2026-05 - Google releases stable channel update addressing the issue per the Google Chrome Update Blog
Technical Details for CVE-2026-7947
Vulnerability Analysis
The vulnerability resides in Chrome's Network component, where untrusted input is not adequately validated before it influences browser-rendered UI elements. An attacker who has already gained code execution within the sandboxed renderer process can craft an HTML page that abuses this validation gap. The result is UI spoofing, where visual elements such as URLs, dialogs, or security indicators can be manipulated to misrepresent the true origin or state of content. Successful exploitation requires user interaction and a high-complexity attack chain that begins with a separate renderer compromise. The confidentiality and availability impact is limited, and integrity is unaffected at the browser-process level.
Root Cause
The root cause is improper input validation [CWE-20] in network-related code paths that surface data into user-visible browser chrome or page-rendered surfaces. When attacker-controlled input bypasses validation, it reaches UI rendering logic without being normalized or sanitized. Chromium engineers tracked the underlying defect in the Chromium Issue Tracker Entry.
Attack Vector
Exploitation requires two preconditions. First, the attacker must already control or compromise the renderer process, typically through a separate vulnerability. Second, the victim must interact with a crafted HTML page delivered through that compromised renderer. The attacker then issues network-related operations whose unvalidated input drives spoofed UI states. Common exploitation outcomes include disguising the displayed origin to support phishing, hiding security warnings, or masking download prompts to coerce user action.
No public proof-of-concept code or in-the-wild exploitation has been documented for CVE-2026-7947. The vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog.
Detection Methods for CVE-2026-7947
Indicators of Compromise
- Chrome browser processes running versions earlier than 148.0.7778.96 after the patch release window.
- Renderer process crashes, unexpected child-process spawns, or anomalous network requests preceding user-reported UI inconsistencies.
- User reports of mismatched address bar contents, unexpected dialog overlays, or security indicators that disappear during navigation.
Detection Strategies
- Inventory deployed Chrome versions across endpoints and flag any host running a build older than 148.0.7778.96.
- Hunt for renderer-process exploitation precursors such as suspicious JavaScript-driven crashes or sandbox anomalies that could enable this secondary spoofing step.
- Correlate web proxy logs with endpoint telemetry to identify users visiting unfamiliar domains immediately before credential submission events.
Monitoring Recommendations
- Continuously monitor Chrome version compliance through endpoint management telemetry and alert on drift below the patched build.
- Review phishing and credential-harvesting alerts for cases where users report visiting a legitimate-looking site that triggered Chrome anomalies.
- Track DNS and TLS metadata for newly registered domains delivering complex client-side payloads to Chrome users.
How to Mitigate CVE-2026-7947
Immediate Actions Required
- Update Google Chrome to version 148.0.7778.96 or later on all Windows, macOS, and Linux endpoints.
- Force-restart Chrome after deployment to ensure the patched binary is loaded; pending updates do not take effect until restart.
- Validate enterprise update channels and managed policies to confirm staged rollouts have completed for all user populations.
Patch Information
Google addressed CVE-2026-7947 in the Chrome stable channel at version 148.0.7778.96. Refer to the Google Chrome Update Blog for the official advisory and the Chromium Issue Tracker Entry for upstream tracking.
Workarounds
- No vendor-supplied workaround exists; upgrading to the patched Chrome build is the only supported remediation.
- Reinforce phishing awareness training so users scrutinize address bar contents and certificate indicators when entering credentials.
- Restrict execution of unsigned or unvetted Chrome extensions that could broaden the renderer attack surface.
# Verify installed Chrome version on Windows, macOS, and Linux
# Windows (PowerShell)
(Get-Item "C:\Program Files\Google\Chrome\Application\chrome.exe").VersionInfo.ProductVersion
# macOS
/Applications/Google\ Chrome.app/Contents/MacOS/Google\ Chrome --version
# Linux
google-chrome --version
# Required output: 148.0.7778.96 or later
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
