VulnerabilityAnalyzed
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.
MEDIUM 4.2EPSS 0.14%
Does this matter?
Lower severity and a low EPSS score (0.14%). Track it; it rarely justifies an emergency change on its own.
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)
- CVSS 3.1
- 4.2 MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:L
- EPSS
- 0.14% probability · 4th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-20
- Affected
- google/chrome
- Source
- chrome-cve-admin@google.com
References
- https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.htmlVendor Advisory
- https://issues.chromium.org/issues/513028160Permissions Required
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.