CVE-2026-18013 Overview
CVE-2026-18013 affects Google Chrome for iOS in versions prior to 151.0.7922.72. The vulnerability stems from an inappropriate implementation in the browser that allows a remote attacker to perform user interface (UI) spoofing through a crafted HTML page. Chromium classified the security severity as Low. Successful exploitation requires the victim to visit an attacker-controlled page rendered in the vulnerable version of Chrome for iOS.
UI spoofing vulnerabilities enable adversaries to misrepresent browser chrome elements, address bar contents, or page context. This class of flaw commonly supports phishing and credential-harvesting campaigns rather than direct code execution.
Critical Impact
Attackers can craft HTML content that misleads users about the origin or trust context of a page, increasing the effectiveness of phishing and credential theft on Chrome for iOS.
Affected Products
- Google Chrome for iOS versions prior to 151.0.7922.72
- Mobile browsing sessions on Apple iOS devices running vulnerable Chrome builds
- Users navigating attacker-controlled HTML pages in Chrome for iOS
Discovery Timeline
- 2026-07-30 - CVE-2026-18013 published to the National Vulnerability Database
- 2026-07-30 - Last updated in the NVD database
Technical Details for CVE-2026-18013
Vulnerability Analysis
CVE-2026-18013 is a User Interface Confusion issue in Chrome for iOS. The browser implements certain rendering or navigation logic in a way that permits an attacker-controlled HTML page to manipulate elements users rely on to judge page authenticity. Because iOS constrains browser engine choices, Chrome for iOS uses platform WebKit components, so the defect resides in Chrome's iOS-specific UI layer rather than Blink.
UI spoofing typically involves manipulating the address bar display, security indicators, dialog origins, or navigation state during transitions. An attacker who controls a page can leverage these weaknesses to make a malicious page appear to originate from a trusted domain.
Google addressed the issue in stable release 151.0.7922.72. Details are tracked in the Chromium Issue Tracker Entry and referenced in the Chrome Stable Release Update.
Root Cause
The root cause is an inappropriate implementation in Chrome for iOS UI handling. The affected code path does not correctly enforce the boundary between attacker-controlled page content and trusted browser UI elements. As a result, crafted HTML can influence what users perceive as authoritative browser state.
Attack Vector
A remote attacker delivers a crafted HTML page through a phishing link, malicious advertisement, or compromised site. When a user opens the page in a vulnerable Chrome for iOS build, the page manipulates UI state to spoof identity or navigation context. No authentication is required, and the attack executes at the current user privilege level.
No verified exploit code or public proof-of-concept is available for CVE-2026-18013. See the Chromium Issue Tracker Entry for technical references.
Detection Methods for CVE-2026-18013
Indicators of Compromise
- User reports of Chrome for iOS pages where the address bar or security indicator does not match the visible page content
- Network telemetry showing iOS Chrome user agents visiting newly registered domains hosting credential-harvesting forms
- Phishing reports referencing pages viewed on mobile Chrome where the displayed URL differed from the actual destination
Detection Strategies
- Inspect mobile browser version telemetry from mobile device management (MDM) tools to identify Chrome for iOS installs below 151.0.7922.72
- Correlate reported phishing incidents with iOS Chrome user-agent strings to identify targeting patterns
- Review web proxy and DNS logs for iOS Chrome sessions terminating on domains flagged for spoofing or phishing content
Monitoring Recommendations
- Track Chrome for iOS version distribution across managed devices using MDM inventory reporting
- Monitor threat intelligence feeds for phishing kits designed to exploit browser UI spoofing on mobile platforms
- Alert on end-user phishing reports where the reporter used Chrome on iOS to encounter the suspicious page
How to Mitigate CVE-2026-18013
Immediate Actions Required
- Update Chrome for iOS to version 151.0.7922.72 or later through the Apple App Store
- Push the updated version to managed devices using MDM policies where available
- Communicate phishing awareness guidance to users who browse on iOS devices
Patch Information
Google released the fix in Chrome for iOS 151.0.7922.72. Users should install this version through the Apple App Store. Enterprise administrators managing iOS fleets should verify update deployment through their MDM platform. Refer to the Chrome Stable Release Update for release details.
Workarounds
- Instruct users to verify page origin by tapping the address bar to display the full URL before submitting credentials
- Restrict access to unknown or untrusted links delivered through email or messaging apps on iOS devices
- Use enterprise DNS filtering to block known phishing and credential-harvesting domains reachable from mobile devices
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
