CVE-2026-28991 is an out-of-bounds read vulnerability in the Apple Accelerate component. The flaw was addressed through improved bounds checking. A malicious application running on an affected device may be able to trigger the condition and cause a denial-of-service. Apple indicates the issue affects multiple platforms, including iOS 26.5 and earlier, iPadOS 26.5 and earlier, macOS Tahoe 26.5 and earlier, tvOS 26.5 and earlier, visionOS 26.5 and earlier, and watchOS 26.5 and earlier.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
13 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A denial-of-service vulnerability in Accelerate that may allow an app to cause a denial-of-service.
An out-of-bounds read vulnerability in macOS Tahoe that may allow an app to cause a denial-of-service.
An out-of-bounds read vulnerability in Apple TV software that could allow an app to cause a denial-of-service.
An out-of-bounds read vulnerability that could allow an app to cause a denial-of-service on affected Apple Watch devices.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.