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Apple released macOS Big Sur 11.2 and Security Update 2021-001 for Catalina and Mojave to address numerous vulnerabilities affecting the kernel, WebKit, ImageIO, CoreText, CoreGraphics, CFNetwork, NetFSFramework, XNU, and other components. The flaws could enable denial of service, information disclosure, arbitrary code execution, and kernel-level compromise.
Among the fixes, CVE-2021-1782 is a race-condition flaw that allowed a malicious application to elevate privileges; Apple said it may have been actively exploited and corrected it through improved locking. Apple also reported potential in-the-wild exploitation of CVE-2021-1764 in the Kernel and CVE-2021-1789 in WebKit, underscoring the need to apply the available macOS security updates.
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The CVE record for CVE-2021-1782 was published, identifying a race-condition privilege-escalation flaw that Apple said may have been actively exploited. Apple had addressed it with improved locking in iOS, iPadOS, macOS, watchOS, and tvOS updates.
Apple released security updates for macOS Big Sur, Catalina, and Mojave, addressing numerous vulnerabilities across components including the kernel and WebKit. Apple said CVE-2021-1764 (Kernel) and CVE-2021-1789 (WebKit) may have been actively exploited in the wild.
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Apple disclosed two high-severity macOS vulnerabilities, **CVE-2026-28891** and **CVE-2026-28817**, that could allow an application or sandboxed process to escape sandbox restrictions. Both flaws were attributed to race conditions, classified as **CWE-362**, and carried the same `CVSS v3.1` vector: `AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H`, indicating local exploitation with potentially severe impact to confidentiality, integrity, and availability. Apple said the issues were remediated through **additional validation** and **improved state handling**. Fixes were released for **macOS Sequoia 15.7.5**, **macOS Sonoma 14.8.5**, and **macOS Tahoe 26.4**, and organizations running affected macOS systems should prioritize those updates because successful exploitation could let untrusted code break out of the sandbox and operate with broader system access.
Jun 29, 2026
Apple released security updates for **macOS Sequoia 15.7.5** and **macOS Sonoma 14.8.5**, patching a wide range of vulnerabilities across core operating system components, networking, printing, privacy controls, the kernel, and bundled open-source software. The advisories describe flaws that could lead to **privilege escalation**, **sandbox escape**, **unauthorized access to sensitive data**, **kernel memory disclosure**, **denial of service**, **arbitrary file write**, and modification of protected file system areas. Affected components include high-risk areas such as **Kernel**, **CoreServices**, **CUPS**, **CFNetwork**, **NetAuth**, **SMB**, **TCC**, **Security**, and **PackageKit**, with additional privacy-related fixes for apps and services including **Mail**, **Messages**, **Focus**, **Phone**, and **Spotlight**. Apple also shipped patches for third-party code in **Apache**, **curl**, and ImageIO-related libraries, and credited external researchers and organizations including **KU Leuven**, **Google**, **Trend Micro Zero Day Initiative**, **Nosebeard Labs**, **DBAppSecurity WeBin lab**, and Renault researchers for reporting the issues.
Jun 29, 2026
Apple released **Safari 26.4** and **Xcode 26.4** security updates to address multiple vulnerabilities affecting macOS systems. The Safari update for **macOS Sonoma** and **macOS Sequoia** fixes seven `CVE`-tracked issues in **WebKit** and **WebKit Sandboxing** that could enable **Content Security Policy** and **Same Origin Policy** bypasses, **cross-site scripting**, process crashes, cross-origin access to script message handlers, improper processing of restricted web content, and user fingerprinting. Apple said the flaws were mitigated through improved state management, input validation, logic checks, memory handling, and authorization controls. The **Xcode 26.4** advisory covers two vulnerabilities on systems running **macOS Tahoe 26.2 and later**. Apple patched an out-of-bounds read in `otool` (`CVE-2026-28890`) that could let an app trigger an unexpected system termination, and a permissions flaw in **Simulator** (`CVE-2026-28889`) that could allow an app to read arbitrary files as **root**. Apple credited external researchers for the findings and made the updates available through the **Mac App Store**, developer download channels, and its security releases pages.
Jun 29, 2026