About the security content of macOS Tahoe 26.5 - Apple Support

For our customers' protection, Apple doesn't disclose, discuss, or confirm security issues until an investigation has occurred and patches or releases are available. Recent releases are listed on the Apple security releases page. Apple security documents reference vulnerabilities by CVE-ID when possible. For more information about security, see the Apple Product Security page. Released May 11, 2026 Available for: macOS Tahoe Impact: An app may be able to cause a denial-of-service Description: An out-of-bounds read was addressed with improved bounds checking. CVE-2026-28991: Seiji Sakurai (@HeapSmasher) Available for: macOS Tahoe Impact: An app may be able to bypass certain Privacy preferences Description: A permissions issue was addressed with additional restrictions. CVE-2026-28988: Asaf Cohen Available for: macOS Tahoe Impact: An app may be able to cause unexpected system termination Description: A buffer overflow was addressed with improved bounds checking. CVE-2026-28959: Dave G. Available for: macOS Tahoe Impact: A malicious app may be able to break out of its sandbox Description: A logic issue was addressed with improved restrictions.

CVE-2026-28995: Vamshi Paili, Tony Gorez (@tonygo_) for Reverse Society Available for: macOS Tahoe Impact: Processing a maliciously crafted image may lead to a denial-of-service Description: This is a vulnerability in open source code and Apple Software is among the affected projects. The CVE-ID was assigned by a third party. Learn more about the issue and CVE-ID at cve.org. CVE-2026-1837 Available for: macOS Tahoe Impact: Processing a maliciously crafted media file may lead to unexpected app termination or corrupt process memory Description: A memory corruption issue was addressed with improved input validation. CVE-2026-28956: impost0r (ret2plt) Available for: macOS Tahoe Impact: Processing an audio stream in a maliciously crafted media file may terminate the process Description: The issue was addressed with improved memory handling. CVE-2026-39869: David Ige of Beryllium Security Available for: macOS Tahoe Impact: An app may be able to access private information Description: This issue was addressed through improved state management.

CVE-2026-28922: Arni Hardarson Available for: macOS Tahoe Impact: Processing a maliciously crafted file may lead to unexpected app termination Description: The issue was addressed with improved checks. CVE-2026-28936: Andreas Jaegersberger & Ro Achterberg of Nosebeard Labs Available for: macOS Tahoe Impact: Parsing a maliciously crafted file may lead to an unexpected app termination Description: An out-of-bounds access issue was addressed with improved bounds checking. CVE-2026-28918: Niels Hofmans, Anonymous working with TrendAI Zero Day Initiative Available for: macOS Tahoe Impact: An app may be able to gain root privileges Description: A parsing issue in the handling of directory paths was addressed with improved path validation. CVE-2026-28915: Andreas Jaegersberger & Ro Achterberg of Nosebeard Labs Available for: macOS Tahoe Impact: An app may be able to access sensitive user data Description: A race condition was addressed with additional validation. CVE-2026-43659: Alex Radocea Available for: macOS Tahoe Impact: A malicious app may be able to break out of its sandbox Description: A logging issue was addressed with improved data redaction.