CVE-2026-28910

Published May 11, 2026 CVSS 3.1 · 3.3 Low EPSS < 1% KEV · Not listed

Description

This issue was addressed with improved permissions checking. This issue is fixed in macOS Tahoe 26.4. A malicious app may be able to access arbitrary files.

Analysis

Technical impact

A permissions checking flaw in macOS allows a malicious application to read any file on the system without user consent. The vulnerability is a lack of proper authorization enforcement for protected resources, represented by CWE‑284, which can lead to confidential data disclosure.

Affected Systems

All versions of Apple macOS released before macOS Tahoe 26.4 contain this flaw. The fix is included in macOS 26.4, so any older releases are vulnerable and should be upgraded.

Risk and Exploitability

The EPSS score is below 1 % but non‑zero, indicating a very low yet possible exploitation probability. The CVSS score of 3.3 marks the vulnerability as low severity. The flaw does not appear in the CISA KEV catalog. Exploitation is likely possible only from a local or user‑initiated application; no remote trigger is documented. A successful exploitation would allow the attacker to read arbitrary files on the target system.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Apple

macOS

affected

Version	Status	Constraints
`0`	affected	< 26.4

Configuration 1 [-]

cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*

No data.

Vendor Product Versions

Apple

Macos

Version	Status	Scheme	Platform
`[0,26.4)`	affected	generic	—

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

Apply macOS 26.4 or later to incorporate the fixed permission checks.
Restrict the installation of unknown third‑party apps by enforcing Gatekeeper and ensuring user confirmation before execution.
Enable System Integrity Protection and review file‑system audit logs for anomalous read attempts to detect potential misuse.

Generated by OpenCVE AI on May 13, 2026 at 00:25 UTC.

Tracking

Advisories

No advisories available

Metrics

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact Low

Integrity Impact None

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.119% probability within 30 days)

Exploitation none

Automatable no

Technical Impact partial

References

Link	Providers
https://support.apple.com/en-us/126794

History

May 13, 2026 3:30 PM Affected versions updated View changes

Type	Values Removed	Values Added
CPEs		cpe:2.3:o:apple:macos::::::::

May 12, 2026 11:45 PM Title updated. Weaknesses updated View changes

Type	Values Removed	Values Added
Title	Arbitrary File Access via Permission Checking Flaw in macOS
Weaknesses	CWE-285

May 12, 2026 9:15 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		cvssV3_1 `{'score': 3.3, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N'}` ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

May 11, 2026 11:00 PM First appearance in the feed. Affected vendors updated View changes

Type	Values Removed	Values Added
First Time appeared		Apple Apple macos
Vendors & Products		Apple Apple macos

May 11, 2026 10:00 PM Title updated. Weaknesses updated View changes

Type	Values Removed	Values Added
Title		Arbitrary File Access via Permission Checking Flaw in macOS
Weaknesses		CWE-284 CWE-285

May 11, 2026 8:45 PM Description updated. Added references View changes

Type	Values Removed	Values Added
Description		This issue was addressed with improved permissions checking. This issue is fixed in macOS Tahoe 26.4. A malicious app may be able to access arbitrary files.
References		https://support.apple.com/en-us/126794