CVE-2026-11108: Chrome Android NFC Sandbox Escape Vulnerability – Patch Guidance

Technical summary

CVE-2026-11108 is a privilege escalation vulnerability in the NFC implementation within Google Chrome on Android. The root cause is classified as CWE-269 (Improper Assertion), indicating that the browser fails to properly validate or assert security constraints in the NFC code path. An attacker can craft a malicious HTML page that, when visited by a user, leverages the NFC handling flaw to escape Chrome's sandbox and execute code with elevated privileges. The vulnerability affects Chrome versions prior to 149.0.7827.53 on Android. While Chromium's internal severity rating is Medium, the CVSS v3.1 score of 8.8 reflects the high impact: network-accessible, low complexity attack surface with user interaction, and resulting compromise of confidentiality, integrity, and availability.

Business impact

For organizations supporting Android devices in their workforce, this vulnerability poses a direct risk to enterprise security. A compromised device can become a foothold for lateral network movement, data exfiltration, or credential theft. The attack vector—a crafted HTML page—is difficult to prevent through network controls alone, as users may be socially engineered or encounter the malicious page through legitimate browsing. Industries handling sensitive data, financial services, healthcare, and government entities face elevated risk. Device management and compliance frameworks may be circumvented if Chrome sandbox escapes allow installation of monitoring tools or access to encrypted credentials.

Affected systems

Google Chrome on Android versions prior to 149.0.7827.53 are vulnerable. The vulnerability is specific to Android; Chrome on Windows, macOS, and Linux are not affected by this particular NFC flaw. Both end-user devices and organization-managed Android devices running Chrome are at risk. The scope includes any Android user agent running an outdated Chrome build—in practice, this spans devices running Android 8.0 and later that have Chrome installed and have not yet auto-updated to the patched version.

Exploitability

Exploitation requires a user to visit a crafted HTML page delivered over the network. No authentication, special network positioning, or local access is required from the attacker's perspective. The attack complexity is low, and the user interaction needed is a normal browsing action. Given the prevalence of phishing, drive-by downloads, and malvertising, the practical exploitability is high. There are no known public exploits or KEV listing as of the data snapshot, but the straightforward attack surface suggests proof-of-concept development is likely. In real-world scenarios, attackers would combine this with social engineering to increase click-through rates.

Remediation

The primary remediation is to update Google Chrome on Android to version 149.0.7827.53 or later. Chrome's auto-update mechanism on Android typically pushes updates within days, but users should verify their current version in Chrome's settings (Menu > About Chrome) and manually trigger an update if needed. For organizations managing Android devices via MDM (Mobile Device Management) solutions, push the latest Chrome update through your policy framework and verify deployment. Until patching is possible, restrict user browsing to internal or well-vetted websites and educate users to avoid clicking suspicious links.

Patch guidance

Google has released version 149.0.7827.53 of Chrome for Android with the fix. Verify compatibility with your supported Android OS versions before rollout. For enterprise deployments: (1) Test the patched Chrome version in a lab environment on representative Android devices and OS levels. (2) Stage the update via MDM or configure auto-update policies. (3) Monitor deployment completion and correlate with your asset inventory. (4) Document the patched version in your change management system. Users on personal devices should enable auto-update in the Play Store and check Settings > Apps > Google Chrome > App details for the current version. Patch urgently given the HIGH CVSS score and the ease of attack delivery.

Detection guidance

Monitor for Chrome process crashes or unexpected privilege elevation on Android devices. Logs from MDM platforms can track Chrome app version adoption over time. Network detection is challenging since the attack uses standard HTTPS traffic to deliver the malicious page; focus instead on behavioral indicators: unusual app installations following a Chrome update, unexpected network exfiltration, or device management policy violations post-compromise. Endpoint detection tools with Android support should flag any attempt to run code outside Chrome's designated sandbox. For those with access to Chrome crash logs (via Chromium crash reporting), watch for crashes in the NFC handling code paths. User awareness training should highlight the risk of clicking links from untrusted sources, particularly those promising unusual functionality or requiring device permissions.

Why prioritize this

This vulnerability merits immediate attention due to the combination of high CVSS score (8.8), straightforward attack vector (user browsing), lack of KEV status indicating no active weaponization yet (but likely imminent), and the widespread use of Chrome on Android. The privilege escalation outcome creates a severe confidentiality, integrity, and availability impact. Delayed patching leaves devices vulnerable to targeted or mass exploitation campaigns. While Chromium's severity is rated Medium, the objective CVSS score and real-world exploitation ease justify prioritizing this above routine patches.

Risk score, explained

The CVSS v3.1 score of 8.8 (HIGH) reflects: (1) Network Attack Vector (AV:N)—no special access or proximity required. (2) Low Attack Complexity (AC:L)—no special conditions or evasion techniques needed. (3) No Privileges Required (PR:N)—attacker does not need prior system access. (4) Required User Interaction (UI:R)—user must visit a malicious page, a realistic scenario. (5) Unchanged Scope (S:U)—impact is limited to the vulnerable component, but given sandbox escape, this is effectively a scope change. (6) High Confidentiality, Integrity, and Availability impact (C:H/I:H/A:H)—code execution with elevated privileges can access or modify any data the Chrome process can, and crash the browser or device. This score appropriately captures a sandbox escape as a severe risk, even though Chromium's internal assessment is Medium.

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