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CVE-2026-9944 Google CVE debrief

CVE-2026-9944 is a high-severity uninitialized use vulnerability in ANGLE, the graphics layer used by Google Chrome. The flaw exists in versions prior to 148.0.7778.216 and enables a remote attacker who has already compromised the renderer process to leak cross-origin data through a crafted HTML page. The vulnerability stems from CWE-457 (Use of Uninitialized Variable), which can lead to information disclosure when memory containing sensitive data is accessed before proper initialization. The issue was addressed in the Chrome stable channel update released May 28, 2026. No known exploitation in ransomware campaigns has been reported, and the vulnerability is not listed in CISA's Known Exploited Vulnerabilities catalog.

Vendor
Google
Product
Chrome
CVSS
LOW 3.1
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 users running Google Chrome versions prior to 148.0.7778.216, particularly those handling sensitive cross-origin data in web applications. Security teams responsible for browser security posture and patch management. Web application developers relying on same-origin policy protections for sensitive data isolation.

Technical summary

The vulnerability resides in ANGLE (Almost Native Graphics Layer Engine), Chrome's compatibility layer for translating OpenGL ES calls to native graphics APIs. An uninitialized variable condition allows memory contents—including potentially sensitive cross-origin data—to be leaked when a crafted HTML page triggers the vulnerable code path. Exploitation requires prior compromise of the renderer process, indicating this vulnerability is typically chained with other exploits rather than used for initial access. The fix was released in Chrome 148.0.7778.216 on May 28, 2026.

Defensive priority

high

Recommended defensive actions

  • Update Google Chrome to version 148.0.7778.216 or later to remediate this vulnerability
  • Verify Chrome version via chrome://settings/help and apply pending updates immediately
  • For managed enterprise environments, validate that Chrome updates are deployed via organizational update policies
  • Review browser isolation and site isolation policies as defense-in-depth measures against renderer compromise
  • Monitor for anomalous cross-origin data access patterns in web application logs
  • Assess whether any users accessed untrusted HTML content on unpatched Chrome versions during the exposure window
  • Consider implementing additional sandboxing controls for high-risk browsing scenarios pending patch verification

Evidence notes

Vulnerability description and severity rating sourced from NVD record and Chrome release notes. CWE-457 classification confirmed via NVD weaknesses field. Affected version boundary (prior to 148.0.7778.216) derived from Chrome stable channel release documentation. Vendor attribution to Google based on source references from [email protected].

Official resources

2026-05-28