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CVE-2026-28891 is a sandbox escape vulnerability in Apple NetAuth affecting macOS Sequoia, Sonoma, and Tahoe. Apple states the issue was caused by a race condition and was addressed with additional validation. Successful exploitation may allow a locally running application to break out of the macOS app sandbox. Publicly available vendor information does not disclose the specific vulnerable function or code path within NetAuth.
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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.
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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.
6 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A race condition vulnerability in Apple macOS that may allow an app to break out of its sandbox.
A race condition vulnerability in macOS Sequoia that could allow an app to break out of its sandbox.
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.