Vulnerability in Apple Iphone OS
CVE-2026-9963
Uninitialized Use in iOS in Google Chrome on iOS prior to 148.0.7778.216 allowed a remote attacker who convinced a user to engage in specific UI gestures to execute arbitrary code inside a sandbox via a crafted HTML page. (Chromium security severity: High)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.004 (31.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 31st percentile — 31.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.001
Affected products
- Apple Iphone OS
- Google Chrome — versions 148.0.7778.216
Weakness classification (CWE)
References
- chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304… (Release Notes)
- issues.chromium.org/issues/505143241 (Permissions Required, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-9963?
- CVE-2026-9963 is a high-severity vulnerability in Apple Iphone OS, classified under CWE-457. CVSS score: 7.5/10. Published 2026-05-28.
- How severe is CVE-2026-9963?
- High severity. CVSS v3 base score is 7.5 out of 10.