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Mallory
Medium

Notification privacy leak in macOS Tahoe (iCloud notifications)

IdentifiersCVE-2026-20648CWE-200· Exposure of Sensitive Information…

A privacy issue in macOS where sensitive notification-related data was stored in a location accessible to other apps. Apple addressed the issue by moving the sensitive data to a protected location. On vulnerable systems, a malicious application may be able to access notifications originating from other iCloud devices. Fixed in macOS Tahoe 26.3.

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ANALYST BRIEF

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.

Unauthorized disclosure of notification content from other iCloud devices to a malicious local application, resulting in a privacy breach and potential exposure of sensitive information contained in notifications.

Mitigation

If you can’t patch tonight, do this now.

No vendor workaround is described in the provided content. Risk reduction prior to patching: restrict installation/execution of untrusted applications (e.g., application allowlisting/MDM controls) to reduce the likelihood of a malicious app accessing the data.

Remediation

Patch, then assume compromise.

Upgrade to macOS Tahoe 26.3 (or later), where Apple has fixed the issue by relocating sensitive notification data to a protected location.
PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

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.

VendorProductType
AppleMacosoperating_system

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

ACTIVITY FEED

Recent activity

3 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.

What this page doesn’t show

The version that knows your environment.

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Exposure mapping

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Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity2

Community discussion across Reddit, Mastodon, and other social sources.