What is CVE-2026-28954?

CVE-2026-28954 is a high-severity vulnerability in Apple iOS And Ipados, classified under Authentication Bypass by Spoofing. CVSS score: 7.5/10. Published 2026-05-11.

How severe is CVE-2026-28954?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Apple iOS And Ipados

CVE-2026-28954

A file quarantine bypass was addressed with additional checks. This issue is fixed in iOS 18.7.9 and iPadOS 18.7.9, macOS Sequoia 15.7.7, macOS Sonoma 14.8.7, macOS Tahoe 26.5. A maliciously crafted disk image may bypass Gatekeeper checks.

Published 2026-05-11 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.004 (35.1th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 35th percentile — 35.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000

Affected products

Weakness classification (CWE)

CWE-290 — Authentication Bypass by Spoofing

References

support.apple.com/en-us/127111 (Release Notes, Vendor Advisory)
support.apple.com/en-us/127115 (Release Notes, Vendor Advisory)
support.apple.com/en-us/127116 (Release Notes, Vendor Advisory)
support.apple.com/en-us/127117 (Release Notes, Vendor Advisory)

Frequently asked questions

What is CVE-2026-28954?: CVE-2026-28954 is a high-severity vulnerability in Apple iOS And Ipados, classified under Authentication Bypass by Spoofing. CVSS score: 7.5/10. Published 2026-05-11.
How severe is CVE-2026-28954?: High severity. CVSS v3 base score is 7.5 out of 10.