How severe is CVE-2023-32439?

CVE-2023-32439 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-32439 being actively exploited?

Yes. CVE-2023-32439 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2023-06-23, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2023-32439?

CVE-2023-32439 primarily affects Apple Safari. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-32439?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2023-32439 have an EU (EUVD) identifier?

Yes. CVE-2023-32439 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-36683. It is also flagged as exploited in the EUVD (since 2023-06-23).

When was CVE-2023-32439 published?

CVE-2023-32439 was published on 2023-06-23 and last updated on 2026-06-17.

CVE-2023-32439

CVE-2023-32439 is a high-severity vulnerability in Apple Safari with a CVSS 3.x base score of 8.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2023-06-23). The underlying weakness is classified as CWE-843.

Key facts

Severity: High (CVSS 3.x base score 8.8)
EPSS exploit prediction: 24% (98th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2023-06-23)
EU (EUVD) id: EUVD-2023-36683
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2023-06-23)
Weakness: CWE-843
Affected product: Apple Safari
Published: 2023-06-23
Last modified: 2026-06-17

Description

A type confusion issue was addressed with improved checks. This issue is fixed in iOS 16.5.1 and iPadOS 16.5.1, iOS 15.7.7 and iPadOS 15.7.7, macOS Ventura 13.4.1, Safari 16.5.1. Processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited.

Frequently asked questions

What is CVE-2023-32439?: A type confusion issue was addressed with improved checks. This issue is fixed in iOS 16.5.1 and iPadOS 16.5.1, iOS 15.7.7 and iPadOS 15.7.7, macOS Ventura 13.4.1, Safari 16.5.1. Processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited.
How severe is CVE-2023-32439?: CVE-2023-32439 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-32439 being actively exploited?: Yes. CVE-2023-32439 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2023-06-23, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2023-32439?: CVE-2023-32439 primarily affects Apple Safari. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-32439?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2023-32439 have an EU (EUVD) identifier?: Yes. CVE-2023-32439 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-36683. It is also flagged as exploited in the EUVD (since 2023-06-23).
When was CVE-2023-32439 published?: CVE-2023-32439 was published on 2023-06-23 and last updated on 2026-06-17.

References

Affected products (5)

cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*
cpe:2.3:a:webkitgtk:webkitgtk\+:*:*:*:*:*:*:*:*

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