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PatchSiren cyber security CVE debrief

CVE-2026-9876 Google CVE debrief

A critical use-after-free vulnerability in WebGL on Google Chrome for Android prior to version 148.0.7778.216 enables remote attackers to potentially escape the browser sandbox via a crafted HTML page. The vulnerability stems from improper memory management in the WebGL implementation, where a freed memory object is subsequently accessed, leading to memory corruption that can be leveraged for sandbox escape. This affects only the Android platform and carries Chromium's highest severity rating of Critical. The vulnerability was disclosed in the Chrome Stable Channel update on May 28, 2026, with a fix available in version 148.0.7778.216. No known exploitation in the wild has been confirmed, and the vulnerability is not listed in CISA's Known Exploited Vulnerabilities catalog.

Vendor
Google
Product
Chrome
CVSS
CRITICAL 9.6
CISA KEV
Not listed in stored evidence
Original CVE published
2026-05-28
Original CVE updated
2026-05-29
Advisory published
2026-05-28
Advisory updated
2026-05-29

Who should care

Organizations with Android device fleets, mobile security teams, BYOD program administrators, and security teams responsible for browser security posture should prioritize this vulnerability due to its critical severity and potential for sandbox escape on a widely deployed mobile browser platform.

Technical summary

The vulnerability exists in the WebGL implementation of Google Chrome on Android, where a use-after-free condition can be triggered through malicious HTML content. Successful exploitation corrupts memory in a way that may allow an attacker to break out of Chrome's sandbox security boundary. The attack vector requires user interaction with a crafted web page, and the vulnerability is platform-specific to Android. The fix was released as part of Chrome's standard stable channel security update process.

Defensive priority

critical

Recommended defensive actions

  • Update Google Chrome on Android devices to version 148.0.7778.216 or later immediately
  • Prioritize patching for enterprise-managed Android devices with Chrome browser access to untrusted web content
  • Consider implementing application control policies to restrict browser versions until patching is complete
  • Monitor for anomalous Chrome browser crashes or unexpected sandbox escape attempts on Android endpoints
  • Review and update mobile device management (MDM) policies to enforce minimum Chrome version requirements
  • Assess web content filtering controls to reduce exposure to potentially malicious HTML content on Android devices

Evidence notes

Vulnerability description and affected version range sourced from NVD record. Chromium security severity rating of Critical confirmed. CWE-416 (Use After Free) weakness classification from official source. Fix version 148.0.7778.216 identified in Chrome release notes. Android platform restriction explicitly stated in description.

Official resources

2026-05-28T23:16:45.543Z