CVEs / CVE-2023-43000
CVE-2023-43000: Apple Multiple products Use-After-Free Vulnerability
- Known exploited in the CISA KEV catalog since 5 Mar 2026
- high 8.8 CVSS 3.1 (NVD)
- EPSS 4.04% chance of exploitation in the next 30 days, higher than 90% of CVEs (30 Oct 2026)
- Last changed at its sources
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Summary
Apple macOS, iOS, iPadOS, and Safari 16.6 contain a use-after-free vulnerability due to the processing of maliciously crafted web content that may lead to memory corruption.
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.
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| Apple macOS | from unspecified, before 13.5 | 13.5 |
| Apple iOS and iPadOS | from unspecified, before 16.6 | 16.6 |
| Apple Safari | from unspecified, before 16.6 | 16.6 |
| Apple iOS and iPadOS | from unspecified, before 15.8.7 | 15.8.7 |
Exploitation
| In CISA KEV since | 5 Mar 2026 |
|---|---|
| Due date for US federal agencies | 26 Mar 2026 |
| Used in ransomware campaigns | Unknown |
| Required action | Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. |
Severity
| CVSS 3.1 | 8.8 highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HScored by NVD |
|---|---|
| Weakness | CWE-416 |
References
- CVE-2023-43000 on NVD
- CVE-2023-43000 in the CISA KEV catalog
- https://support.apple.com/en-us/120324 (cited by CISA)
- https://support.apple.com/en-us/120331 (cited by CISA)
- https://support.apple.com/en-us/120338 (cited by CISA)
- CVE-2023-43000 on OSV
- https://support.apple.com/en-us/120324 Release Notes, Vendor Advisory
- https://support.apple.com/en-us/120331 Release Notes, Vendor Advisory
- https://support.apple.com/en-us/120338 Release Notes, Vendor Advisory
- https://support.apple.com/en-us/126632 Release Notes, Vendor Advisory
- https://cloud.google.com/blog/topics/threat-intelligence/coruna-powerful-ios-exploit-kit Exploit, Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-43000 US Government Resource
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.