What is CVE-2026-11277?

CVE-2026-11277 is a medium-severity vulnerability in Apple Iphone OS, classified under Improper Access Control. CVSS score: 4.3/10. Published 2026-06-05.

How severe is CVE-2026-11277?

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

Vulnerability in Apple Iphone OS

CVE-2026-11277

Insufficient policy enforcement in Chrome for iOS in Google Chrome on iOS prior to 149.0.7827.53 allowed a remote attacker to bypass discretionary access control via a crafted HTML page. (Chromium security severity: Low)

Published 2026-06-05 · last modified 2026-07-23.

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:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.002 (10.4th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 10th percentile — 10.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

Apple Iphone OS
Google Chrome — versions 149.0.7827.53

Weakness classification (CWE)

CWE-284 — Improper Access Control

References

chromereleases.googleblog.com/2026/06/stable-channel-update-for-desktop.html (Release Notes)
issues.chromium.org/issues/501839664 (Permissions Required)

Frequently asked questions

What is CVE-2026-11277?: CVE-2026-11277 is a medium-severity vulnerability in Apple Iphone OS, classified under Improper Access Control. CVSS score: 4.3/10. Published 2026-06-05.
How severe is CVE-2026-11277?: Medium severity. CVSS v3 base score is 4.3 out of 10.