How severe is CVE-2023-43000?

CVE-2023-43000 has a CVSS score of 8.8/10, rated HIGH. Immediate patching is strongly recommended.

Which packages are affected by CVE-2023-43000?

Affected package information for CVE-2023-43000 is not yet fully mapped. Check the official advisory links for details.

How do I fix CVE-2023-43000?

No fixed version has been published for CVE-2023-43000 yet. Monitor the advisory for updates, apply mitigations recommended by the vendor, and use O3 Security to track when a fix becomes available in your stack.

Is CVE-2023-43000 actively exploited in the wild?

No public exploit code has been indexed for CVE-2023-43000 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2023-43000?

CVE-2023-43000 has an EPSS (Exploit Prediction Scoring System) score of 0.0%, placing it in the 8th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

Is CVE-2023-43000 in the CISA Known Exploited Vulnerabilities catalog?

Yes. CVE-2023-43000 (Apple Multiple products Use-After-Free Vulnerability) was added to CISA's Known Exploited Vulnerabilities (KEV) catalog on 2026-03-05. CISA required all US federal civilian agencies to remediate this vulnerability by 2026-03-26. The required action was: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. Being listed in the KEV catalog is the strongest possible confirmation of active exploitation — treat this as a critical priority.

What type of vulnerability is CVE-2023-43000?

CVE-2023-43000 is classified as Use After Free (CWE-416). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was CVE-2023-43000 published, and has it been updated?

CVE-2023-43000 was published on November 5, 2025 and was last updated on March 23, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

CVE-2023-43000: high severity vulnerability (CVSS 8.8)

EPSS Exploitation Probability

via FIRST.org ↗

0.0%probability of exploitation in next 30 days

Lower Risk8th percentile0.00%

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

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.

Frequently Asked Questions

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.

O3 Security · Impact-Aware SCA

Is CVE-2023-43000 in your stack?

O3 detects CVE-2023-43000 across dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.

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