Sandbox escape in Apple libxpc (CVE-2026-20667)
Information currently not available to provide a detailed vulnerability description beyond the vendor advisory summary. Apple reports CVE-2026-20667 as a logic issue in libxpc addressed with improved checks, where an app may be able to break out of its sandbox. The issue is fixed in watchOS 26.3, iOS 26.3, iPadOS 26.3, macOS Tahoe 26.3, macOS Sonoma 14.8.4, and macOS Sequoia 15.7.4.
Are you exposed to this one?
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Impact, mitigation & remediation
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
Impact
What an attacker gets, and what they’ve been doing with it.
Mitigation
If you can’t patch tonight, do this now.
Remediation
Patch, then assume compromise.
Exploits
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Affected products & vendors
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.
Recent activity
10 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Sandbox escape via libxpc.
Lock-screen information disclosure due to authorization/state management issue; fixed with improved state management.
The version that knows your environment.
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.