CVE-2026-9892: Chrome Android Sandbox Escape in Skia Graphics Library

Technical summary

CVE-2026-9892 is a sandbox escape vulnerability in Skia, Chrome's graphics rendering engine, affecting Chrome on Android versions prior to 148.0.7778.216. The vulnerability stems from inappropriate implementation in how Skia handles certain graphic operations. An attacker with control of the renderer process can exploit this through crafted HTML to achieve sandbox escape (CWE-269: Improper Restriction of Rendered UI Layers or Frames). The attack requires network access, high complexity conditions, and user interaction but results in complete confidentiality, integrity, and availability compromise if successful.

Business impact

Successful exploitation could allow attackers to move laterally from a compromised browser process to the Android system level, potentially accessing device storage, contacts, location data, and other sensitive information stored on the device. For enterprises deploying Chrome on managed Android devices, this represents a path from browser compromise to full device compromise. The requirement for prior renderer process compromise somewhat limits opportunistic attacks, but combined with other vulnerabilities or supply-chain compromises, it significantly elevates risk.

Affected systems

Google Chrome on Android operating systems running version 148.0.7778.215 and earlier are affected. Patched versions 148.0.7778.216 and later remediate this issue. Android versions themselves are not directly vulnerable; the issue is specific to the Chrome browser application. Organizations should verify their deployed Chrome versions on Android devices, particularly in environments where employees use personal or managed devices.

Exploitability

Exploitation requires a two-stage attack: first, the attacker must compromise Chrome's renderer process (typically through another vulnerability or malicious content), and second, they must induce the user to visit a crafted HTML page. The attack complexity is rated as high, reflecting the difficulty of reliably exploiting the underlying graphics engine flaw and the sandbox itself. While not listed in the Known Exploited Vulnerabilities catalog, the critical Chromium severity designation and sandbox-escape nature warrant aggressive patching prioritization.

Remediation

Update Google Chrome on affected Android devices to version 148.0.7778.216 or later. For enterprise environments, enforce automated Chrome updates or use Mobile Device Management (MDM) policies to push the patched version. Verify successful deployment across your device fleet, paying attention to devices where automatic updates may be disabled or delayed.

Patch guidance

Google has released Chrome version 148.0.7778.216 for Android containing the fix. Organizations should prioritize deployment of this version through their standard update mechanisms. Check the Google Chrome release notes and security advisory for confirmation of the patch. For managed Android devices, MDM solutions like Google Workspace Device Management or third-party EMM platforms should be configured to enforce this minimum version. Testing the patch in a non-production environment before widespread rollout is recommended to ensure compatibility with enterprise applications.

Detection guidance

Monitor for Chrome version compliance across your Android fleet using MDM tools or mobile threat defense solutions. Check for abnormal Chrome process behavior, unexpected system-level permissions granted to Chrome, or signs of sandbox escape attempts (unusual system calls, out-of-process execution, unauthorized file access). Network detection is limited since exploitation requires prior renderer compromise; focus on post-compromise indicators such as unexpected data exfiltration or lateral movement from devices where Chrome was compromised.

Why prioritize this

Despite a CVSS score of 8.3 (HIGH), this deserves urgent prioritization because: (1) sandbox escape vulnerabilities are among the most dangerous in browsers, converting browser compromise to full system compromise; (2) Chrome on Android is widely deployed in both consumer and enterprise environments; (3) Chromium rated it as Critical severity; (4) the barrier to exploitation—requiring prior renderer compromise—is non-trivial but becomes lower in supply-chain or targeted attack scenarios. Organizations should patch within 2 weeks rather than waiting for standard patch cycles.

Risk score, explained

The CVSS 3.1 score of 8.3 reflects high impact (confidentiality, integrity, and availability all compromised) with network attack vector and high complexity. The score appropriately emphasizes the severity of sandbox escape, though context matters: the requirement for prior renderer compromise and user interaction somewhat limits the immediate blast radius compared to a direct remote code execution. The Chromium Critical designation and prevalence of Chrome on Android justify treating this as a high-priority risk despite the technical attack prerequisites.

Frequently asked questions