How severe is CVE-2026-28978?

CVE-2026-28978 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-28978 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-28978?

CVE-2026-28978 affects Apple Macos. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-28978?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-28978 have an EU (EUVD) identifier?

Yes. CVE-2026-28978 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29277.

When was CVE-2026-28978 published?

CVE-2026-28978 was published on 2026-05-11 and last updated on 2026-06-17.

CVE-2026-28978

CVE-2026-28978 is a high-severity vulnerability in Apple Macos with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-284.

Key facts

Severity: High (CVSS 3.x base score 8.8)
EPSS exploit prediction: 0% (4th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-29277
Weakness: CWE-284
Affected product: Apple Macos
Published: 2026-05-11
Last modified: 2026-06-17

Description

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 26.5. A malicious app may be able to break out of its sandbox.

Frequently asked questions

What is CVE-2026-28978?: 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 26.5. A malicious app may be able to break out of its sandbox.
How severe is CVE-2026-28978?: CVE-2026-28978 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-28978 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-28978?: CVE-2026-28978 affects Apple Macos. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-28978?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-28978 have an EU (EUVD) identifier?: Yes. CVE-2026-28978 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29277.
When was CVE-2026-28978 published?: CVE-2026-28978 was published on 2026-05-11 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*

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