CVE-2026-9986

Insufficient validation of untrusted input in OptimizationGuide in Google Chrome prior to 148.0.7778.216 allowed a remote attacker who had compromised the renderer process to perform UI spoofing via a crafted HTML page. (Chromium security severity: High)

Score

CVSS 3.1 4.2 Medium

Status

Analyzed - chrome-cve-admin@google.com

Published

2026-05-28

Last modified

2026-05-29

Weaknesses

CWE-20

Affected products

• Chrome (Google)

References

• https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html
• https://issues.chromium.org/issues/513028160