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CVE-2026-9990

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% 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-416

Description

Use after free in WebAppInstalls in Google Chrome on Mac prior to 148.0.7778.216 allowed a remote attacker who convinced a user to engage in specific UI gestures to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: High)

Affected products

• Google Chrome: before 148.0.7778.216 — fixed in 148.0.7778.216

How to fix

Upgrade to a fixed version: Google Chrome 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/513128608

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