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CVE-2026-28914 Apple CVE debrief

A logic issue was addressed with improved file handling. This issue is fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.5. A maliciously crafted ZIP archive may bypass Gatekeeper checks. This vulnerability affects macOS systems, particularly those using Sequoia, Sonoma, and Tahoe. The issue involves improper handling of ZIP archives, which could lead to unauthorized access if exploited. Apple has addressed this through security updates.

Vendor
Apple
Product
macOS
CVSS
MEDIUM 5.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-05-11
Original CVE updated
2026-07-27
Advisory published
2026-05-11
Advisory updated
2026-07-27

Who should care

System administrators and users of Apple macOS, particularly those using macOS Sequoia, Sonoma, and Tahoe, should apply the updates to prevent potential bypass of Gatekeeper checks by malicious ZIP archives. This includes IT teams responsible for macOS systems, security professionals managing vulnerability remediation, and end-users of these systems.

Technical summary

The CVE-2026-28914 vulnerability involves a logic issue in file handling that was addressed by Apple through improved handling of ZIP archives. This issue was fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, and macOS Tahoe 26.5. The vulnerability could allow a maliciously crafted ZIP archive to bypass Gatekeeper checks, potentially leading to unauthorized access or execution of malicious code. Affected systems include macOS Sequoia, Sonoma, and Tahoe. Apple has released security updates to address this issue.

Defensive priority

Medium priority should be given to applying the patches due to the potential for malicious ZIP archives to bypass security checks. However, given the potential impact, it should be treated with caution and addressed in a timely manner.

Recommended defensive actions

  • Apply the latest security updates for macOS Sequoia, Sonoma, and Tahoe.
  • Ensure Gatekeeper is enabled and configured properly.
  • Be cautious when opening ZIP archives from untrusted sources.
  • Review compensating controls for exposed systems while remediation is scheduled and verified.
  • Check relevant monitoring, detection, and logs for exposed assets that need extra review.
  • Track exceptions, retest remediated assets, and close the item only after evidence is documented.
  • Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.

Evidence notes

The CVE record and NVD detail provide information on the vulnerability and its fixes. Apple has released updates addressing this issue. Evidence is limited to CVE and NVD details. Defenders should verify affected systems, review Apple guidance, and ensure updates are applied. Additional verification tasks may be needed based on specific environments and configurations.

Official resources

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-05-11T21:18:53.903Z and has not been modified since then. The NVD entry is currently Modified.