CVE-2026-9986

CVSS 4.2 MEDIUMEPSS 0.1%CWE-20

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)

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:L

Affected products

Google · Chrome

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References

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