What is CVE-2026-9955?

CVE-2026-9955 is a medium-severity vulnerability in Apple Iphone_os, classified under Information Disclosure. CVSS score: 4.3/10. Published 2026-05-28.

How severe is CVE-2026-9955?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Information disclosure in Apple Iphone_os

CVE-2026-9955

Inappropriate implementation in iOS in Google Chrome on iOS prior to 148.0.7778.216 allowed a remote attacker to leak cross-origin data via a crafted HTML page. (Chromium security severity: High)

Vulnerability class: Information Disclosure

EPSS: 0.000 (9.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N.

Affected products

Apple Iphone_os
Google Chrome — versions 148.0.7778.216

Weakness classification (CWE)

CWE-200 — Information Disclosure

References

chrome-cve-admin@google.com (Release Notes)
chrome-cve-admin@google.com (Permissions Required, Vendor Advisory)

Frequently asked questions

What is CVE-2026-9955?: CVE-2026-9955 is a medium-severity vulnerability in Apple Iphone_os, classified under Information Disclosure. CVSS score: 4.3/10. Published 2026-05-28.
How severe is CVE-2026-9955?: Medium severity. CVSS v3 base score is 4.3 out of 10.