CVE-2026-28820

Sensitive-data access via undisclosed StorageKit checks

Published Mar 25, 2026 · Updated Mar 25, 2026

Information disclosure in StorageKit in Apple macOS before 26.4 allows local users to access sensitive user data through an app. Apple identifies deficient checks in StorageKit but has not disclosed the checked operation, input, or data boundary. Execution of an app on the Mac and user interaction are required; the reported consequence is read access to sensitive user data, with no integrity or availability impact.

CVSS severity5.5
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in StorageKit in Apple macOS before 26.4 allows local users to access sensitive user data through an app. Apple identifies deficient checks in StorageKit but has not disclosed the checked operation, input, or data boundary. Execution of an app on the Mac and user interaction are required; the reported consequence is read access to sensitive user data, with no integrity or availability impact.

The record

CVE
CVE-2026-28820
Published
Mar 25, 2026
Updated
Mar 25, 2026
Vendor
Apple
Product
macOS
Classifications
CWE-200, T1005
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 25, 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 <26.4

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Apple · macOSversion=0 <26.4

Published CVSS scores

5.3NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
5.5CISA-ADPCVSS:3.1/AV:L/AC:L/PR:N/UI:R/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.

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No observations available

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

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1005Data from Local System

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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