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01 Record

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.

HighPUBLISHEDCNA: apple
CNA base score8.8 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

02 Description

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.

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
  • Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.73% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 54.0% of scored records. A rank, not a probability.
NVD base score
9.6 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
NVD analysis status
Modified. NVD last modified this record on 2026-06-17.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2024-10-28 21:07Z2 YR AGO
Last updated
2026-04-02 18:07Z7 MO AGO
Reserved
2024-07-10
Assigning CNA
apple
Record state
PUBLISHED
Severity
High (CVSS 8.8)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weaknesses
No CWE assigned
Data version
5.2
Document digest
fa02ce931e8946a4c9bcaaaf8dc765dabfab93df60bc98abdee6d09507b1d735

05 Affected products

VendorProductVersionsPlatforms
AppleiOS and iPadOS0 to < 18.1—
appleios0 to < 18.1—
appleipados0 to < 18.1—

06 References