Medium

User fingerprinting in Apple Sandbox Profiles

IdentifiersCVE-2026-28863CWE-284· Improper Access Control

CVE-2026-28863 is a privacy vulnerability in Apple Sandbox Profiles affecting iOS 26.4 and earlier, iPadOS 26.4 and earlier, tvOS 26.4 and earlier, visionOS 26.4 and earlier, and watchOS 26.4 and earlier. Apple describes the issue as a permissions problem that was addressed with additional restrictions. Due to insufficient sandbox/profile restrictions, a local app may have been able to access signals or resources that allowed fingerprinting of the user or device. Apple’s public advisory does not disclose the specific API, entitlement, or sandbox rule involved.

For your environment

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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.

Successful exploitation allows an app to fingerprint the user, undermining platform privacy protections. This can enable persistent or probabilistic identification of a user/device across app sessions or contexts, potentially supporting tracking, correlation of activity, and reduction of anonymity. Apple’s published information does not indicate code execution, privilege escalation, or direct data modification as an impact of this CVE.

Mitigation

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

Until patched, reduce exposure by limiting installation and execution of untrusted or unnecessary apps, especially on affected Apple platforms. Use only vetted applications from trusted sources and minimize app permissions and device exposure where operationally feasible. No specific workaround beyond applying Apple’s updates is provided in the available advisory material.

Remediation

Patch, then assume compromise.

Apply the vendor fixes by updating affected devices to iOS 26.4, iPadOS 26.4, tvOS 26.4, visionOS 26.4, watchOS 26.4, or later. Apple states the issue was fixed by adding additional restrictions in Sandbox Profiles.

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

AppleIosoperating_system

AppleIpadosoperating_system

AppleIphone Osoperating_system

AppleTvosoperating_system

AppleVisionosoperating_system

AppleWatchosoperating_system

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

ACTIVITY FEED

Recent activity

4 sources tracked across advisories and community write-ups. News coverage will land here when it surfaces.

4 SOURCESView more in app

No news coverage yet. Advisories and community discussion only.

What this page doesn’t show

The version that knows your environment.

This page is what’s public. Mallory adds the parts that aren’t: which of your assets are affected, which adversaries are exploiting it right now, which detections to deploy, and what to do tonight.

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Exposure mapping

Query your assets running an affected version, and investigate the blast radius.

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 activity4