Mac · Apple · released August 17, 2026
Apple macOS security updates, August 17, 2026: every vulnerability, rated
Apple fixed 34 macOS vulnerabilities on August 17, 2026, in macOS Tahoe 26.6.2. None was reported as exploited when it was published. 6 involve running code, kernel or root privileges, a sandbox escape or a remote attacker, so they belong in this week's work. Macs on older macOS versions only get some of these fixes; Apple's own guidance is that not every security issue is fixed in previous major versions.
- CVEs
- 34
- Patch now
- 0
- This week
- 6
- Normal cycle
- 26
- Low
- 2
Fixed in: macOS Tahoe 26.6.2Apple security notes
This week6 on this page
- This weekMacAugust 17, 2026
CVE-2026-28935Kernel
In Kernel: An app may be able to cause unexpected system termination or corrupt kernel memory. Apple's fix: The issue was addressed with improved memory handling. Fixed in macOS Tahoe 26.6.2 and macOS Sequoia 15.8.
- This weekMacAugust 17, 2026
CVE-2026-64736IOMobileFrameBuffer
In IOMobileFrameBuffer: An app may be able to cause unexpected system termination or corrupt kernel memory. Apple's fix: An out-of-bounds access issue was addressed with improved bounds checking. Fixed in macOS Tahoe 26.6.2 and macOS Sequoia 15.8.
- This weekMacAugust 17, 2026
CVE-2026-65330Kernel
In Kernel: An app may be able to cause unexpected system termination or corrupt kernel memory. Apple's fix: The issue was addressed with improved memory handling. Fixed in macOS Tahoe 26.6.2 and macOS Sequoia 15.8.
- This weekMacAugust 17, 2026
CVE-2026-65343Kernel
In Kernel: A remote attacker may be able to cause unexpected system termination. Apple's fix: A use after free issue was addressed with improved memory management. Fixed in macOS Tahoe 26.6.2.
- This weekMacAugust 17, 2026
CVE-2026-65346ImageIO
In ImageIO: Processing an image may lead to arbitrary code execution. Apple's fix: An integer overflow was addressed with improved input validation. Fixed in macOS Tahoe 26.6.2 and macOS Sequoia 15.8.
- This weekMacAugust 17, 2026
CVE-2026-65349Kernel
In Kernel: An app may be able to cause unexpected system termination or read kernel memory. Apple's fix: An out-of-bounds read was addressed with improved input validation. Fixed in macOS Tahoe 26.6.2 and macOS Sequoia 15.8.
Normal cycle26 on this page · tap one for its risk review
- Normal cycleMacAugust 17, 2026
CVE-2026-43794WebKit
In WebKit: Processing maliciously crafted web content may lead to memory corruption. Apple's fix: A memory corruption issue was addressed with improved memory handling. Fixed in macOS Tahoe 26.6.2.
- Normal cycleMacAugust 17, 2026
CVE-2026-43795WebKit
In WebKit: Processing maliciously crafted web content may lead to an unexpected Safari crash. Apple's fix: The issue was addressed with improved memory handling. Fixed in macOS Tahoe 26.6.2.
- Normal cycleMacAugust 17, 2026
CVE-2026-64715WebKit
In WebKit: Processing maliciously crafted web content may lead to an unexpected process crash. Apple's fix: A use-after-free issue was addressed with improved memory management. Fixed in macOS Tahoe 26.6.2.
- Normal cycleMacAugust 17, 2026
CVE-2026-64778WebKit History
In WebKit History: Visiting a maliciously crafted website may leak sensitive data. Apple's fix: The issue was addressed with improved checks. Fixed in macOS Tahoe 26.6.2.
- Normal cycleMacAugust 17, 2026
CVE-2026-64779WebKit Storage
In WebKit Storage: Processing maliciously crafted web content may lead to an unexpected Safari crash. Apple's fix: A memory corruption vulnerability was addressed with improved locking. Fixed in macOS Tahoe 26.6.2.
- Normal cycleMacAugust 17, 2026
CVE-2026-64780WebKit
In WebKit: Processing maliciously crafted web content may lead to an unexpected Safari crash. Apple's fix: The issue was addressed with improved checks. Fixed in macOS Tahoe 26.6.2.
- Normal cycleMacAugust 17, 2026
CVE-2026-64781WebKit
In WebKit: Processing maliciously crafted web content may lead to an unexpected Safari crash. Apple's fix: The issue was addressed with improved input validation. Fixed in macOS Tahoe 26.6.2.
- Normal cycleMacAugust 17, 2026
CVE-2026-64782WebKit
In WebKit: Processing maliciously crafted web content may lead to an unexpected Safari crash. Apple's fix: A memory corruption vulnerability was addressed with improved locking. Fixed in macOS Tahoe 26.6.2.
- Normal cycleMacAugust 17, 2026
CVE-2026-64784WebKit
In WebKit: Processing maliciously crafted web content may lead to an unexpected Safari crash. Apple's fix: An out-of-bounds access issue was addressed with improved bounds checking. Fixed in macOS Tahoe 26.6.2.
- Normal cycleMacAugust 17, 2026
CVE-2026-64788IOGPUFamily
In IOGPUFamily: Processing maliciously crafted web content may lead to memory corruption. Apple's fix: The issue was addressed with improved memory handling. Fixed in macOS Tahoe 26.6.2.
- Normal cycleMacAugust 17, 2026
CVE-2026-65331WebKit
In WebKit: Processing maliciously crafted web content may lead to an unexpected Safari crash. Apple's fix: This issue was addressed through improved state management. Fixed in macOS Tahoe 26.6.2.
- Normal cycleMacAugust 17, 2026
CVE-2026-65332WebKit
In WebKit: Processing maliciously crafted web content may lead to an unexpected Safari crash. Apple's fix: This issue was addressed through improved state management. Fixed in macOS Tahoe 26.6.2.
- Normal cycleMacAugust 17, 2026
CVE-2026-65333WebKit
In WebKit: Processing maliciously crafted web content may lead to an unexpected Safari crash. Apple's fix: This issue was addressed through improved state management. Fixed in macOS Tahoe 26.6.2.
- Normal cycleMacAugust 17, 2026
CVE-2026-65334WebKit
In WebKit: Processing maliciously crafted web content may lead to an unexpected Safari crash. Apple's fix: A memory corruption issue was addressed with improved state management. Fixed in macOS Tahoe 26.6.2.
- Normal cycleMacAugust 17, 2026
CVE-2026-65335WebKit
In WebKit: Processing maliciously crafted web content may lead to an unexpected Safari crash. Apple's fix: This issue was addressed through improved state management. Fixed in macOS Tahoe 26.6.2.
- Normal cycleMacAugust 17, 2026
CVE-2026-65336WebKit
In WebKit: Processing maliciously crafted web content may lead to an unexpected Safari crash. Apple's fix: This issue was addressed through improved state management. Fixed in macOS Tahoe 26.6.2.
- Normal cycleMacAugust 17, 2026
CVE-2026-65337WebKit
In WebKit: Processing maliciously crafted web content may lead to an unexpected Safari crash. Apple's fix: This issue was addressed through improved state management. Fixed in macOS Tahoe 26.6.2.
- Normal cycleMacAugust 17, 2026
CVE-2026-65338WebKit
In WebKit: Processing maliciously crafted web content may lead to an unexpected Safari crash. Apple's fix: The issue was addressed with improved memory handling. Fixed in macOS Tahoe 26.6.2.
- Normal cycleMacAugust 17, 2026
CVE-2026-65339Audio
In Audio: An app may be able to leak sensitive user information. Apple's fix: A logic issue was addressed with improved checks. Fixed in macOS Tahoe 26.6.2 and macOS Sequoia 15.8.
- Normal cycleMacAugust 17, 2026
CVE-2026-65340WebKit
In WebKit: Processing maliciously crafted web content may lead to an unexpected Safari crash. Apple's fix: This issue was addressed through improved state management. Fixed in macOS Tahoe 26.6.2.
- Normal cycleMacAugust 17, 2026
CVE-2026-65341WebKit
In WebKit: Processing maliciously crafted web content may lead to memory corruption. Apple's fix: The issue was addressed with improved memory handling. Fixed in macOS Tahoe 26.6.2.
- Normal cycleMacAugust 17, 2026
CVE-2026-65351WebKit
In WebKit: Processing maliciously crafted web content may lead to an unexpected Safari crash. Apple's fix: This issue was addressed through improved state management. Fixed in macOS Tahoe 26.6.2.
- Normal cycleMacAugust 17, 2026
CVE-2026-65352WebKit
In WebKit: A website may be able to determine a user's IP address with Private Relay turned on. Apple's fix: An information disclosure issue was addressed with improved state management. Fixed in macOS Tahoe 26.6.2.
- Normal cycleMacAugust 17, 2026
CVE-2026-65355Authentication Services
In Authentication Services: A website may be able to determine a user's IP address with Private Relay turned on. Apple's fix: An information disclosure issue was addressed with improved state management. Fixed in macOS Tahoe 26.6.2.
- Normal cycleMacAugust 17, 2026
CVE-2026-65390WebRTC
In WebRTC: Processing maliciously crafted web content may lead to memory corruption. Apple's fix: An integer overflow was addressed with improved input validation. Fixed in macOS Tahoe 26.6.2.
- Normal cycleMacAugust 17, 2026
CVE-2026-65391WebRTC
In WebRTC: Processing maliciously crafted web content may lead to memory corruption. Apple's fix: An out-of-bounds write issue was addressed with improved bounds checking. Fixed in macOS Tahoe 26.6.2.
Low2 on this page · tap one for its risk review
- LowMacAugust 17, 2026
CVE-2026-64787WebKit
In WebKit: Processing maliciously crafted web content may lead to an unexpected process termination. Apple's fix: A use-after-free issue was addressed with improved memory management. Fixed in macOS Tahoe 26.6.2.
- LowMacAugust 17, 2026
CVE-2026-65347ImageIO
In ImageIO: Processing an image may lead to a denial-of-service. Apple's fix: The issue was addressed with improved checks. Fixed in macOS Tahoe 26.6.2.
Why an MSP manages this
Reading the list is the easy part
Nobody running a business reads all of them, and nobody should have to. The work is deciding which ones matter today, testing the fixes, getting them onto every PC and Mac without breaking the workday, and proving it was done.
- 01
Triage that starts with the exploited ones
Most of these fixes can ride the normal monthly rollout. A handful need action the same day. Telling them apart, every month, on every machine, is the core of the work, and it is the part an office manager rarely has time for.
- 02
Testing before everyone gets it
Updates go to a test ring and a pilot group first, so a broken accounting package or design tool shows up on two machines instead of forty, and the rollout pauses until it is sorted.
- 03
Restarts that don't wreck the workday
Windows updates usually need a restart and macOS updates often do. Deadlines, maintenance windows and grace periods get the fix installed without forcing a reboot in the middle of a client call.
- 04
Macs managed as seriously as PCs
Windows patching tools don't patch Macs. macOS updates need their own install-by deadlines through device management, and major upgrades need the same compatibility testing a Windows feature update gets.
- 05
A plan for machines that can't update
Hardware that ages out and versions past end of support stop getting every fix. They need a decision, isolate, upgrade or replace, before they become the easiest way in.
- 06
Proof when someone asks
Cyber insurance applications, customer security questionnaires and frameworks such as the FTC Safeguards Rule all ask how you keep systems patched. A managed service keeps the inventory and the reports that answer them.
The ins and outs
What keeping Windows and Mac patched actually involves
Windows
Patch Tuesday, and the exceptions
Microsoft ships security updates on the second Tuesday of each month, and out of band when something can't wait. This log marks the out-of-band ones.
Cumulative updates
Each month's Windows update carries the earlier months' fixes, so a PC that missed one catches up with the next, as long as it actually installs.
Fixed first, announced later
Some fixes ship before the vulnerability is disclosed. This log flags them, because a PC that is already current is already covered.
Rings, deferrals and deadlines
Windows Update for Business and Intune let you delay updates for a test group, set an install-by deadline and give a grace period before a forced restart.
Known Issue Rollback and safeguard holds
Microsoft can quietly roll back a change that breaks something, and holds back feature updates from PCs it knows will have trouble. Both explain why two PCs on the same network can be on different builds.
Feature updates and end of support
Each Windows version is serviced for a fixed period. Windows 10 PCs past end of support only get security fixes through the paid Extended Security Updates program.
Mac
No fixed release day
Apple publishes security updates when they are ready, often several times a month around a major release, so Mac patching runs on alerts, not a calendar.
Updates versus upgrades
A point update (26.7 to 26.7.1) fixes problems. A major upgrade (Tahoe to Golden Gate) changes the system and needs the same app testing as a Windows feature update.
Older versions get some fixes, not all
Apple's deployment guide says not every security issue is fixed in previous major versions. Staying a version behind is a choice with a cost, not a safe default.
Install-by deadlines through device management
Without enforcement, a macOS update prompt can be put off again and again. Device management can set a deadline so the update installs on schedule.
Macs that age out
When a Mac can no longer run a current macOS version, it stops getting the full set of fixes. Inventory by model and macOS version shows which ones are next.
Apple Business for zero-touch setup
New Macs enrolled through Apple Business arrive already managed, so update policy applies from the first login instead of after someone remembers to enroll them.
Both platforms
Third-party apps aren't on these lists
Browsers, PDF readers, accounting software, VPN clients and plug-ins patch on their own schedules. A machine can be current on Windows or macOS and still exposed through an app.
Firmware and drivers
BIOS and UEFI firmware, docks and network gear get security fixes too, and they rarely update themselves.
Recovery keys before big changes
Before a feature update or a major macOS upgrade, confirm BitLocker and FileVault recovery keys are escrowed somewhere you can reach.
Laptops that are rarely in the office
Remote and travelling staff need updates delivered over the internet with the same deadlines as office machines, or they drift months behind.
You can't patch what you can't see
An up-to-date inventory of every PC and Mac, with its version and last update, is what turns a list like this one into a finished job.