CVE-2023-43000
Apple Multiple products Use-After-Free Vulnerability
Apple Multiple Products
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.
Exploitation status
CISA Known Exploited Vulnerabilities
Listed by CISA on 5 March 2026. US federal agencies were required to remediate it by 26 March 2026.
EPSS — exploitation probability
FIRST puts the probability of exploitation activity in the next 30 days at 4%, which is higher than 90.7% of all scored vulnerabilities. EPSS is a forecast of activity, not a measure of severity, and it is rescored daily.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Frequently asked questions
Is CVE-2023-43000 being exploited by ransomware groups?
No ransomware group in this database is currently recorded as exploiting CVE-2023-43000.
What does CVE-2023-43000 affect?
CVE-2023-43000 affects Apple Multiple Products. 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.
How severe is CVE-2023-43000?
CVE-2023-43000 is rated HIGH with a CVSS base score of 8.8. EPSS puts the probability of exploitation in the next 30 days at 4%, higher than 90.7% of all scored vulnerabilities. It is listed in the CISA Known Exploited Vulnerabilities catalog, with a federal remediation deadline of 26 March 2026.
How should organisations respond to CVE-2023-43000?
Apply the vendor patch for Apple Multiple Products as the first priority, and treat any internet-facing instance as the most urgent. Because this vulnerability is associated with ransomware activity, also review whether the affected systems were reachable before patching, rather than assuming that patching alone closes the incident.