CVE-2024-40803Network attack vector

App termination via Keychain Access type confusion

Published Jul 29, 2024 · Updated Apr 2, 2026

Type confusion in Keychain Access in Apple macOS Monterey, Ventura, and Sonoma allows attackers to terminate the app unexpectedly. Apple states that improved checks correct the type confusion but has not published the input path or incompatible types involved. The trigger and privilege requirements are undisclosed; the reported consequence is limited to Keychain Access termination.

CVSS severity7.5
High
EPSS probability1.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Type confusion in Keychain Access in Apple macOS Monterey, Ventura, and Sonoma allows attackers to terminate the app unexpectedly. Apple states that improved checks correct the type confusion but has not published the input path or incompatible types involved. The trigger and privilege requirements are undisclosed; the reported consequence is limited to Keychain Access termination.

The record

CVE
CVE-2024-40803
Published
Jul 29, 2024
Updated
Apr 2, 2026
Vendor
Apple
Product
macOS
Classifications
CWE-843, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 29, 2024CVE publishedPublication date reported by the CVE source.
  2. Apr 2, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <12.7.6
  2. Affected versionversion=0 <13.6.8
  3. Affected versionversion=0 <14.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Apple · macOSversion=0 <12.7.6; version=0 <13.6.8; version=0 <14.6

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-843Access of Resource Using Incompatible Type ('Type Confusion')
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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