What is CVE-2024-40867?

CVE-2024-40867 is a critical-severity vulnerability in Apple iOS And Ipados. CVSS score: 9.6/10. Published 2024-10-28.

How severe is CVE-2024-40867?

Critical severity. CVSS v3 base score is 9.6 out of 10.

Vulnerability in Apple iOS And Ipados

CVE-2024-40867

A custom URL scheme handling issue was addressed with improved input validation. This issue is fixed in iOS 18.1 and iPadOS 18.1. A remote attacker may be able to break out of Web Content sandbox.

Published 2024-10-28 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.6 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.007 (51.3th percentile), scored 2026-10-03.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 51.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

References

support.apple.com/en-us/121563 (Release Notes, Vendor Advisory)
af854a3a-2127-422b-91ae-364da2661108

Frequently asked questions

What is CVE-2024-40867?: CVE-2024-40867 is a critical-severity vulnerability in Apple iOS And Ipados. CVSS score: 9.6/10. Published 2024-10-28.
How severe is CVE-2024-40867?: Critical severity. CVSS v3 base score is 9.6 out of 10.