Critical

Sandbox escape in Apple Printing via path handling

IdentifiersCVE-2026-20688CWE-22· Improper Limitation of a Pathname…

CVE-2026-20688 is a path handling vulnerability in Apple’s Printing component affecting iOS 26.4, iPadOS 26.4, macOS Sequoia 15.7.5, macOS Sonoma 14.8.5, macOS Tahoe 26.4, and visionOS 26.4. Apple states that the issue was caused by improper path handling and was fixed with improved validation. Successful exploitation may allow a local application to break out of its sandbox. Based on the vendor description, the flaw is consistent with improper limitation or validation of filesystem paths within the Printing component, enabling access outside intended sandbox constraints.

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.

A successful exploit allows a local app to escape its sandbox boundary. This can let the app access resources or perform actions outside the restrictions normally enforced by the application sandbox, potentially exposing user data or enabling further post-exploitation activity depending on the app’s entitlements and the surrounding system configuration.

Mitigation

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

Until patches are applied, reduce exposure by limiting execution of untrusted or unnecessary local applications, enforcing application allowlisting where possible, and restricting user ability to install arbitrary apps. Because this is a local app-to-sandbox-escape issue, standard hardening measures such as least privilege, MDM-enforced app controls, and rapid patch deployment are the most relevant mitigations. No vendor-specific workaround beyond updating is provided in the supplied content.

Remediation

Patch, then assume compromise.

Apply the vendor-provided updates that fix the issue: iOS 26.4, iPadOS 26.4, macOS Sequoia 15.7.5, macOS Sonoma 14.8.5, macOS Tahoe 26.4, and visionOS 26.4. Apple indicates the vulnerability was addressed through improved path validation in the affected Printing component.

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

AppleMacosoperating_system

AppleVisionosoperating_system

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

ACTIVITY FEED

Recent activity

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

7 SOURCESView more in app

cyberthroneNews

Mar 26, 2026

Apple Patches numerous vulnerabilities across its products - TheCyberThrone

A medium-severity permissions framework flaw that could allow user fingerprinting and profiling without explicit consent.

apple supportNews

Mar 24, 2026

About the security content of macOS Sequoia 15.7.5 - Apple Support (CA)

A path handling vulnerability in macOS Sequoia that could allow an app to break out of its sandbox.

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 activity5