How severe is CVE-2026-20658?

CVE-2026-20658 has a CVSS 3.x base score of 7.8, 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-2026-20658 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-20658?

CVE-2026-20658 affects Apple Macos. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-20658?

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-2026-20658 have an EU (EUVD) identifier?

Yes. CVE-2026-20658 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-6187.

When was CVE-2026-20658 published?

CVE-2026-20658 was published on 2026-02-11 and last updated on 2026-06-17.

CVE-2026-20658

CVE-2026-20658 is a high-severity vulnerability in Apple Macos with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 3.x base score 7.8)
EPSS exploit prediction: 0% (3rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-6187
Affected product: Apple Macos
Published: 2026-02-11
Last modified: 2026-06-17

Description

A package validation issue was addressed by blocking the vulnerable package. This issue is fixed in macOS Tahoe 26.3. An app may be able to gain root privileges.

Frequently asked questions

What is CVE-2026-20658?: A package validation issue was addressed by blocking the vulnerable package. This issue is fixed in macOS Tahoe 26.3. An app may be able to gain root privileges.
How severe is CVE-2026-20658?: CVE-2026-20658 has a CVSS 3.x base score of 7.8, 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-2026-20658 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-20658?: CVE-2026-20658 affects Apple Macos. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-20658?: 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-2026-20658 have an EU (EUVD) identifier?: Yes. CVE-2026-20658 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-6187.
When was CVE-2026-20658 published?: CVE-2026-20658 was published on 2026-02-11 and last updated on 2026-06-17.

References

https://support.apple.com/en-us/126348

Affected products (1)

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

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