How severe is CVE-2026-39871?

CVE-2026-39871 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-39871 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (23rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-39871?

CVE-2026-39871 affects Apple Macos. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-39871?

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-2026-39871 have an EU (EUVD) identifier?

Yes. CVE-2026-39871 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29294.

When was CVE-2026-39871 published?

CVE-2026-39871 was published on 2026-05-11 and last updated on 2026-06-17.

CVE-2026-39871

CVE-2026-39871 is a high-severity vulnerability in Apple Macos with a CVSS 3.x base score of 7.5. 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-552.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (23rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-29294
Weakness: CWE-552
Affected product: Apple Macos
Published: 2026-05-11
Last modified: 2026-06-17

Description

A path handling issue was addressed with improved logic. This issue is fixed in macOS Sequoia 15.7.7, macOS Sonoma 14.8.7, macOS Tahoe 26.5. An app may be able to observe unprotected user data.

Frequently asked questions

What is CVE-2026-39871?: A path handling issue was addressed with improved logic. This issue is fixed in macOS Sequoia 15.7.7, macOS Sonoma 14.8.7, macOS Tahoe 26.5. An app may be able to observe unprotected user data.
How severe is CVE-2026-39871?: CVE-2026-39871 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-39871 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (23rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-39871?: CVE-2026-39871 affects Apple Macos. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-39871?: 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-2026-39871 have an EU (EUVD) identifier?: Yes. CVE-2026-39871 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29294.
When was CVE-2026-39871 published?: CVE-2026-39871 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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