CVE-2026-28891

Sandbox escape via NetAuth race condition

Published Mar 25, 2026 · Updated Mar 25, 2026

NetAuth race condition in Apple macOS Sonoma before 14.8.5, Sequoia before 15.7.5, and Tahoe before 26.4 allows local users to escape an app sandbox. Apple identifies a race in NetAuth but does not disclose the competing operations; inconsistent state can pass validation. A locally running sandboxed app must win the race; success removes sandbox restrictions, while further privilege gain is not established.

CVSS severity8.1
High
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

NetAuth race condition in Apple macOS Sonoma before 14.8.5, Sequoia before 15.7.5, and Tahoe before 26.4 allows local users to escape an app sandbox. Apple identifies a race in NetAuth but does not disclose the competing operations; inconsistent state can pass validation. A locally running sandboxed app must win the race; success removes sandbox restrictions, while further privilege gain is not established.

The record

CVE
CVE-2026-28891
Published
Mar 25, 2026
Updated
Mar 25, 2026
Vendor
Apple
Product
macOS
Classifications
CWE-362, T1068
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 <14.8.5
  2. Affected versionversion=0 <15.7.5
  3. Affected versionversion=0 <26.4

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Apple · macOSversion=0 <14.8.5; version=0 <15.7.5; version=0 <26.4

Published CVSS scores

8.1CISA-ADPCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
T1068Exploitation for Privilege Escalation

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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