CVE-2024-23271Network attack vector

Cross-origin boundary bypass via undisclosed logic flaw

Published Apr 24, 2024 · Updated Apr 2, 2026

Access control failure in Apple WebKit allows remote attackers to trigger unexpected cross-origin behavior through a malicious website. The flaw is a logic error in WebKit's origin checks, but Apple has not disclosed the affected check or incorrect operation. The attacker must supply web content that a target processes; the public record does not identify the origin-protected data or actions exposed.

CVSS severity7.3
High
EPSS probability0.80%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Access control failure in Apple WebKit allows remote attackers to trigger unexpected cross-origin behavior through a malicious website. The flaw is a logic error in WebKit's origin checks, but Apple has not disclosed the affected check or incorrect operation. The attacker must supply web content that a target processes; the public record does not identify the origin-protected data or actions exposed.

The record

CVE
CVE-2024-23271
Published
Apr 24, 2024
Updated
Apr 2, 2026
Vendor
Apple
Product
iOS
Classifications
CWE-284, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 24, 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=*

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Apple · iOSversion=*
Apple · iOS and iPadOSversion=0 <17.3
Apple · Safariversion=0 <17.3
Apple · tvOSversion=0 <17.3
Apple · macOSversion=0 <14.3
Apple · watchOSversion=0 <10.3

Published CVSS scores

7.3CISA ADP VulnrichmentCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

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-284Improper Access Control
T1189Drive-by Compromise

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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