How severe is CVE-2022-42856?

CVE-2022-42856 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-2022-42856 being actively exploited?

Yes. CVE-2022-42856 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2022-12-14, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2022-42856?

CVE-2022-42856 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-2022-42856?

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-2022-42856 have an EU (EUVD) identifier?

Yes. CVE-2022-42856 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2022-45919. It is also flagged as exploited in the EUVD (since 2022-12-14).

When was CVE-2022-42856 published?

CVE-2022-42856 was published on 2022-12-15 and last updated on 2026-06-17.

CVE-2022-42856

CVE-2022-42856 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 2022-12-14). The underlying weakness is classified as CWE-843.

Key facts

Severity: High (CVSS 3.x base score 8.8)
EPSS exploit prediction: 9% (94th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2022-12-14)
EU (EUVD) id: EUVD-2022-45919
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2022-12-14)
Weakness: CWE-843
Affected product: Apple Safari
Published: 2022-12-15
Last modified: 2026-06-17

Description

A type confusion issue was addressed with improved state handling. This issue is fixed in Safari 16.2, tvOS 16.2, macOS Ventura 13.1, iOS 15.7.2 and iPadOS 15.7.2, iOS 16.1.2. 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 against versions of iOS released before iOS 15.1..

Frequently asked questions

What is CVE-2022-42856?: A type confusion issue was addressed with improved state handling. This issue is fixed in Safari 16.2, tvOS 16.2, macOS Ventura 13.1, iOS 15.7.2 and iPadOS 15.7.2, iOS 16.1.2. 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 against versions of iOS released before iOS 15.1..
How severe is CVE-2022-42856?: CVE-2022-42856 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-2022-42856 being actively exploited?: Yes. CVE-2022-42856 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2022-12-14, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2022-42856?: CVE-2022-42856 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-2022-42856?: 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-2022-42856 have an EU (EUVD) identifier?: Yes. CVE-2022-42856 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2022-45919. It is also flagged as exploited in the EUVD (since 2022-12-14).
When was CVE-2022-42856 published?: CVE-2022-42856 was published on 2022-12-15 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:o:apple:tvos:*:*:*:*:*:*:*:*

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