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CVE-2023-40433VulnerabilityPublished Updated

CVE-2023-40433: Apple macOS · An app may bypass Gatekeeper checks

Affects Apple macOSSource CVE Database V5

0

Not known to be exploited · CVSS 5.5 Medium : upgrade to 13.3 when convenient.

Data as of 25 Oct 2026, 19:02 UTC

CVSS 3.1 base score
5.5Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.1% chance of exploitation in 30 days – higher than 8% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 13.3
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 10 Jan 2024

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-25.

What to do

Upgrade Apple macOS to 13.3.

Affected software

ProductAffectedFixed in
Apple macOSAffected
  • <13.3
Fixed in
  • 13.3

AI-suggested

European organizations should prioritize updating all macOS devices to version Ventura 13.3 or later, where the vulnerability is patched. In addition to patching, organizations should implement strict application whitelisting policies and restrict the execution of unsigned or unverified applications. User education is critical to reduce the risk of social engineering attacks that could trick users into running malicious apps. Endpoint detection and response (EDR) solutions should be configured to monitor for suspicious application behaviors that could indicate exploitation attempts. Network segmentation can limit the impact of compromised devices. Regular audits of macOS systems for compliance with security policies and Gatekeeper settings are recommended. Finally, organizations should maintain up-to-date backups and incident response plans tailored to macOS environments to quickly recover from potential breaches.

Description

A logic issue was addressed with improved checks. This issue is fixed in macOS Ventura 13.3. An app may bypass Gatekeeper checks.

References

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