How severe is CVE-2024-40866?

CVE-2024-40866 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2024-40866 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-40866?

CVE-2024-40866 primarily affects Apple Safari. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2024-40866?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2024-40866 have an EU (EUVD) identifier?

Yes. CVE-2024-40866 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-38699.

When was CVE-2024-40866 published?

CVE-2024-40866 was published on 2024-09-17 and last updated on 2026-06-17.

CVE-2024-40866

CVE-2024-40866 is a medium-severity vulnerability in Apple Safari with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 1% (56th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-38699
Affected product: Apple Safari
Published: 2024-09-17
Last modified: 2026-06-17

Description

The issue was addressed with improved UI. This issue is fixed in Safari 18, macOS Sequoia 15. Visiting a malicious website may lead to address bar spoofing.

Frequently asked questions

What is CVE-2024-40866?: The issue was addressed with improved UI. This issue is fixed in Safari 18, macOS Sequoia 15. Visiting a malicious website may lead to address bar spoofing.
How severe is CVE-2024-40866?: CVE-2024-40866 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2024-40866 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-40866?: CVE-2024-40866 primarily affects Apple Safari. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2024-40866?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2024-40866 have an EU (EUVD) identifier?: Yes. CVE-2024-40866 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-38699.
When was CVE-2024-40866 published?: CVE-2024-40866 was published on 2024-09-17 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*

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