CVE-2026-20603

Private-information disclosure via incomplete Notification Center redaction

Published Feb 11, 2026 · Updated Feb 11, 2026

Information disclosure in Notification Center in Apple macOS before 26.3 allows local users with root privileges to access private information. Notification Center exposes sensitive information because affected releases do not adequately redact it; Apple has not disclosed the specific data path or record format. Exploitation requires a locally running app with root privileges, and the reported consequence is limited to reading private information.

CVSS severity4.4
Medium
EPSS probability0.14%
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 Notification Center in Apple macOS before 26.3 allows local users with root privileges to access private information. Notification Center exposes sensitive information because affected releases do not adequately redact it; Apple has not disclosed the specific data path or record format. Exploitation requires a locally running app with root privileges, and the reported consequence is limited to reading private information.

The record

CVE
CVE-2026-20603
Published
Feb 11, 2026
Updated
Feb 11, 2026
Vendor
Apple
Product
macOS
Classifications
CWE-284, T1005
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Feb 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 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=unspecified <26.3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Apple · macOSversion=unspecified <26.3

Published CVSS scores

4.4NIST NVDCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
4.4CISA-ADPCVSS:3.1/AV:L/AC:L/PR:H/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)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-284Improper Access Control
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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