CVE-2023-43000

Description

A use-after-free issue was addressed with improved memory management. This issue is fixed in macOS Ventura 13.5, iOS 16.6 and iPadOS 16.6, Safari 16.6, iOS 15.8.7 and iPadOS 15.8.7. Processing maliciously crafted web content may lead to memory corruption.

CVSS v3.1 Score

8.8

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CISA Known Exploited Vulnerability

This vulnerability is actively exploited in the wild.

Added: Mar 5, 2026 Remediation due: Mar 26, 2026

Weakness Type (CWE)

CWE-416 Use After Free

Affected Products

Vendor	Product	Versions
apple	safari	< 16.6
apple	ipados	< 15.8.7
apple	ipados	16.0 — 16.6
apple	iphone_os	< 15.8.7
apple	iphone_os	16.0 — 16.6
apple	macos	< 13.5

References

Advisories & Patches

https://support.apple.com/en-us/120324 https://support.apple.com/en-us/120331 https://support.apple.com/en-us/120338 https://support.apple.com/en-us/126632

Exploits

https://cloud.google.com/blog/topics/threat-intelligence/coruna-powerful-ios-exploit-kit

Other References

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-43000

Frequently Asked Questions

What is CVE-2023-43000? +

A use-after-free issue was addressed with improved memory management. This issue is fixed in macOS Ventura 13.5, iOS 16.6 and iPadOS 16.6, Safari 16.6, iOS 15.8.7 and iPadOS 15.8.7. Processing maliciously crafted web content may lead to memory corruption. It has a CVSS v3.1 base score of 8.8 (HIGH). This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog, indicating active exploitation in the wild.

How severe is CVE-2023-43000? +

CVE-2023-43000 has a CVSS v3.1 score of 8.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2023-43000? +

CVE-2023-43000 affects products from apple, specifically: ipados, iphone_os, macos, safari. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2023-43000? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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