CVE-2026-28840

HIGHNVD 7.87.8—

7.8

A permissions issue was addressed with additional restrictions. This issue is fixed in macOS Sequoia 15.7.7, macOS Sonoma 14.8.7, macOS Tahoe 26.4. An app may be able to gain root privileges.

CVSS v3: 7.8
EG Score: 7.8(high)
EPSS: 1.0%
KEV: Not listed

Published

May 11, 2026

Last Modified

May 12, 2026

Advisory Details (3)

Auto-updated May 12, 2026

No patch confirmed yet.

generic

About the security content of macOS Sonoma 14.8.7 - Apple Support

https://support.apple.com/en-us/127117

generic

About the security content of macOS Sequoia 15.7.7 - Apple Support

https://support.apple.com/en-us/127116

generic

About the security content of macOS Tahoe 26.4 - Apple Support

https://support.apple.com/en-us/126794

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-269Improper Privilege Management

Data Freshness Timeline

(refreshed 13× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-31 00:16 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-29 13:44 UTCepss_batch
2026-05-29 13:44 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-27 13:40 UTCepss_batch
2026-05-27 13:40 UTCepss_batch
2026-05-27 13:40 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-24 16:59 UTCepss_batch
2026-05-23 15:21 UTCepss_batch
2026-05-22 21:16 UTCepss_batch
2026-05-20 22:38 UTCepss_batch
2026-05-20 22:38 UTCepss_batch
2026-05-20 22:37 UTCepss_batch
2026-05-20 13:11 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-28840?

CVE-2026-28840 is a high vulnerability published on May 11, 2026. A permissions issue was addressed with additional restrictions. This issue is fixed in macOS Sequoia 15.7.7, macOS Sonoma 14.8.7, macOS Tahoe 26.4. An app may be able to gain root privileges.

When was CVE-2026-28840 disclosed?

CVE-2026-28840 was first published in the National Vulnerability Database on May 11, 2026, with the most recent update on May 12, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2026-28840 actively exploited?

CVE-2026-28840 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2026-28840?

CVE-2026-28840 has a CVSS v3 base score of 7.8 (NVD).

How do I remediate CVE-2026-28840?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-28840, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2026-28840

📅 Published

🔄 Last Modified

📋 Advisory Details (3)

About the security content of macOS Sonoma 14.8.7 - Apple Support

About the security content of macOS Sequoia 15.7.7 - Apple Support

About the security content of macOS Tahoe 26.4 - Apple Support

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2026-28840?

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Advisory Details (3)

Frequently asked(5)

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