CVE-2026-9986
MediumCVSS 4.2Exploitation Probability (EPSS)
Low risk4th percentile - higher than 4% of all known CVEs
Summary
Insufficient validation of untrusted input in the OptimizationGuide component 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.
Risk Assessment
An attacker can spoof a trusted interface, potentially leading to credential theft or tricking the user into performing dangerous actions.
Recommendation
Immediately update Google Chrome to version 148.0.7778.216 or later.
Other vulnerabilities in Google Chrome
See all- CVE-2026-8581High
A use after free vulnerability in GPU in Google Chrome prior to version 148.0.7778.168 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page.
- CVE-2026-8577High
Integer overflow in Fonts in Google Chrome prior to version 148.0.7778.168 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page.
- CVE-2026-8575High
A use after free vulnerability in the UI in Google Chrome prior to version 148.0.7778.168 allowed a remote attacker to potentially perform a sandbox escape via a crafted HTML page.
- CVE-2026-8573High
Integer overflow in Codecs in Google Chrome on Windows prior to version 148.0.7778.168 allowed a remote attacker to potentially perform a sandbox escape via a crafted video file.
- CVE-2026-8569High
An out of bounds write in Codecs in Google Chrome on Mac prior to version 148.0.7778.168 allowed a remote attacker to potentially perform a sandbox escape via a crafted video file.
- CVE-2026-8558High
In Google Chrome prior to version 148.0.7778.168, an out of bounds write in Fonts allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page.
- CVE-2026-8557High
In Google Chrome prior to version 148.0.7778.168, there was a use after free vulnerability in the Accessibility module that allowed a remote attacker who compromised the renderer process to perform privilege escalation via a crafted HTML page.
- CVE-2026-8555High
Use after free in GTK in Google Chrome on Windows prior to version 148.0.7778.168 allows a remote attacker to execute arbitrary code via a crafted HTML page.
- CVE-2026-8551High
A use after free vulnerability in Downloads in Google Chrome prior to version 148.0.7778.168 allowed a remote attacker to execute arbitrary code via a crafted HTML page if a user engaged in specific UI gestures.
- CVE-2026-8549High
Use after free in Media in Google Chrome prior to 148.0.7778.168 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page.
Original NVD description (English source)
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)