CVE-2026-28954Network attack vector

Gatekeeper bypass via crafted disk image

Published May 11, 2026 · Updated May 11, 2026

File quarantine bypass in the Apple Kernel across iOS, iPadOS, and macOS releases allows attackers to evade Gatekeeper via a crafted disk image. Apple identifies insufficient quarantine checks but has not disclosed the disk-image path in which validation fails. Attackers must supply a malicious disk image for processing; successful exploitation bypasses Gatekeeper, with no published evidence of code execution or broader impact.

CVSS severity7.5
High
EPSS probability0.39%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

File quarantine bypass in the Apple Kernel across iOS, iPadOS, and macOS releases allows attackers to evade Gatekeeper via a crafted disk image. Apple identifies insufficient quarantine checks but has not disclosed the disk-image path in which validation fails. Attackers must supply a malicious disk image for processing; successful exploitation bypasses Gatekeeper, with no published evidence of code execution or broader impact.

The record

CVE
CVE-2026-28954
Published
May 11, 2026
Updated
May 11, 2026
Vendor
Apple
Product
iOS and iPadOS
Classifications
CWE-290, T1553.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 11, 2026CVE publishedPublication date reported by the CVE source.
  2. May 11, 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 <18.7.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Apple · iOS and iPadOSversion=0 <18.7.9
Apple · macOSversion=0 <14.8.7; version=0 <15.7.7; version=0 <26.5

Published CVSS scores

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

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-290Authentication Bypass by Spoofing
T1553.001Gatekeeper Bypass

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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