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CVE-2026-20683 is an authentication-state-management vulnerability in the Sign in with Apple authentication flow. A malicious application may abuse improper handling of authentication state to access the user’s Apple Account. Apple addressed the issue through improved state management in iOS 27, iPadOS 27, macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7, and visionOS 27.
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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.
4 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An authentication and state-management flaw in the Sign In With Apple flow that could allow an app to access a user's Apple Account.
macOS Tahoe Sign in with Apple authentication-flow bypass vulnerability.
Authentication flaw allowing an app to abuse Sign in with Apple to access an Apple Account.
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.