What’s Vulnerable › Vulnerabilities

CVE-2026-9986

• Severity: medium (CVSS 4.2 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-28 · updated 2026-07-21
• Weakness: CWE-20

Description

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)

Affected products

• Google Chrome: before 148.0.7778.216; before 148.0.7778.215 — fixed in 148.0.7778.215, 148.0.7778.216

How to fix

Upgrade to a fixed version: Google Chrome 148.0.7778.215, 148.0.7778.216. Check the vendor advisory for mitigations.

References

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

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