CVE-2026-13987 Overview
CVE-2026-13987 is a user interface spoofing vulnerability affecting Google Chrome on Android before version 150.0.7871.47. The flaw resides in the mobile browser's security UI, which fails to render trust indicators correctly under certain conditions. A remote attacker can exploit this weakness by serving a crafted HTML page to a targeted user. Successful exploitation allows the attacker to impersonate legitimate content or security indicators within the browser chrome. The Chromium project classified this issue with Medium severity and mapped it to [CWE-451: User Interface (UI) Misrepresentation of Critical Information].
Critical Impact
Attackers can spoof browser security UI elements on Android devices, enabling convincing phishing and credential theft campaigns against Chrome mobile users.
Affected Products
- Google Chrome for Android prior to 150.0.7871.47
- Chromium-based mobile browsers sharing the affected UI code
- Android devices running vulnerable Chrome builds
Discovery Timeline
- 2026-06-30 - CVE-2026-13987 published to the National Vulnerability Database
- 2026-07-01 - Last updated in NVD database
Technical Details for CVE-2026-13987
Vulnerability Analysis
The vulnerability stems from incorrect handling of security UI elements in the mobile Chrome browser on Android. When a user navigates to a crafted HTML page, the browser displays trust indicators, URL bar contents, or origin information that does not accurately reflect the underlying page context. This misrepresentation enables attackers to construct pages that appear to originate from trusted sources.
Exploitation requires user interaction, meaning the target must visit a malicious page or follow an attacker-controlled link. The vulnerability does not expose confidential data directly and does not affect availability. Its impact is limited to integrity of the information displayed to the user, which is the foundation of most phishing scenarios on mobile devices where screen real estate constraints already limit trust cues.
Root Cause
The root cause is a defect in how the Android Chrome client renders or updates security-relevant UI while processing attacker-supplied HTML content. Because mobile browsers collapse and hide address bar elements to conserve space, edge cases in this rendering path can cause the browser to present stale or manipulated indicators. See the Chromium Issue Tracker #514039122 for technical details tracked by the Chrome security team.
Attack Vector
The attack vector is network-based and requires user interaction. An attacker hosts a crafted HTML page and lures a victim to visit it through phishing, malvertising, or a compromised third-party site. Once loaded, the page manipulates the mobile browser UI to display misleading origin, certificate, or content indicators. The victim, believing they are interacting with a legitimate site, may enter credentials, approve transactions, or download malicious content. No authentication or elevated privileges are required for the attacker.
Because no verified proof-of-concept has been published, technical exploitation details remain limited to the vendor advisory. Refer to the Google Chrome Desktop Update release notes for vendor-supplied information.
Detection Methods for CVE-2026-13987
Indicators of Compromise
- Mobile Chrome instances reporting a version string below 150.0.7871.47 in chrome://version
- Web proxy or DNS telemetry showing user navigation to newly registered domains delivering HTML designed to mimic login pages
- User reports of address bar or padlock indicators behaving inconsistently on Android devices
Detection Strategies
- Inventory Android endpoints and enumerate the installed Chrome build to identify versions prior to 150.0.7871.47
- Correlate mobile browsing telemetry with threat intelligence on phishing infrastructure targeting Chrome mobile users
- Review authentication logs for credential submissions from mobile user agents that follow visits to low-reputation domains
Monitoring Recommendations
- Alert on Android Chrome user agents below the patched version connecting to enterprise identity providers
- Monitor SIEM data for spikes in credential-related events originating from mobile Chrome sessions
- Track newly observed domains referenced by mobile users and flag those matching known brand-impersonation patterns
How to Mitigate CVE-2026-13987
Immediate Actions Required
- Update Google Chrome for Android to version 150.0.7871.47 or later through the Google Play Store
- Enforce mobile application update policies via mobile device management to ensure browser patch compliance
- Communicate phishing awareness guidance to users, emphasizing careful inspection of URLs on mobile devices
Patch Information
Google addressed CVE-2026-13987 in Chrome 150.0.7871.47 on the stable channel. Users and administrators should apply the update through the Play Store or managed Android configurations. Details are available in the Google Chrome stable channel update announcement.
Workarounds
- Restrict mobile browsing to managed browser profiles that enforce automatic updates
- Deploy DNS filtering and secure web gateways to block known phishing and UI-spoofing infrastructure on mobile networks
- Require multi-factor authentication so that credentials captured through spoofed UI cannot be reused in isolation
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
