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VulnerabilityPublished Updated

CVE-2026-28820: Apple macOS · Information Exposure

Affects Apple macOSSource CVE Database V5

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Not known to be exploited · CVSS 5.5 Medium : upgrade to 26.4 when convenient.

Data as of 30 Oct 2026, 11:52 UTC

CVSS 3.1 base score
5.5Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.2% chance of exploitation in 30 days – higher than 12% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 26.4
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 25 Mar 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

What to do

Upgrade Apple macOS to 26.4.

Affected software

ProductAffectedFixed in
ApplemacOSAffected
  • <26.4
Fixed in
  • 26.4

AI-suggested

To mitigate CVE-2026-28820, organizations and users should promptly update all macOS devices to version Tahoe 26.4 or later, where the vulnerability is fixed. Restricting the installation of applications to trusted sources, such as the Apple App Store or verified developers, can reduce the risk of malicious apps exploiting this flaw. Employing endpoint protection solutions that monitor application behavior may help detect suspicious access attempts to sensitive data. User education on the risks of running untrusted applications and social engineering can further reduce exploitation likelihood. Additionally, implementing strict access controls and data encryption can limit the impact of any unauthorized data exposure. Regular auditing of installed applications and system logs can help identify potential exploitation attempts. Organizations should also maintain an inventory of macOS devices and ensure compliance with patch management policies.

Description

This issue was addressed with improved checks. This issue is fixed in macOS Tahoe 26.4. An app may be able to access sensitive user data.

References

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