CVE-2026-84548

macOS Document Parser Integer Overflow Enables Out‑of‑Bounds Read

Published Sep 14, 2026 CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed

Description

An integer overflow was addressed with improved input validation. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7. Processing a maliciously crafted document may lead to an out-of-bounds read.

Analysis

Technical impact

An integer overflow occurs while parsing a maliciously crafted document, allowing the reader to access memory outside the intended bounds. This vulnerability is classified as CWE-190.

Affected Systems

The affected releases are macOS versions prior to Golden Gate 27, Sequoia 15.8, and Tahoe 26.7. Users who have not yet applied these updates remain vulnerable.

Risk and Exploitability

The CVSS score of 5.5 indicates medium severity, while the EPSS score of less than 1% suggests a very low likelihood of exploitation. The issue is not listed in the CISA KEV catalog.

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	< 15.8
`0`	affected	< 26.7
`0`	affected	< 27

Configuration 1 [-]

OR	cpe:2.3:o:apple:macos::::::::
	cpe:2.3:o:apple:macos::::::::

No data.

Vendor Product Versions

Apple

Macos

Version	Status	Scheme	Platform
`[0,15.8)`	affected	generic	—
`[0,26.7)`	affected	generic	—
`[0,27)`	affected	generic	—

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

Install the macOS security update that includes Golden Gate 27, Sequoia 15.8, or Tahoe 26.7.
Until the update is installed, avoid opening documents from untrusted or unknown sources.
Monitor system logs for abnormal memory access errors or crashes that could indicate attempted exploitation.

Generated by OpenCVE AI on September 20, 2026 at 21:48 UTC.

Tracking

Advisories

No advisories available

Metrics

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact None

Availability Impact None

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.170% probability within 30 days)

Exploitation none

Automatable no

Technical Impact partial

References

Link	Providers
https://support.apple.com/en-us/149035
https://support.apple.com/en-us/149042
https://support.apple.com/en-us/149043

History

Sep 20, 2026 10:15 PM Title updated View changes

Type	Values Removed	Values Added
Title		macOS Document Parser Integer Overflow Enables Out‑of‑Bounds Read

Sep 19, 2026 2:30 AM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics	cvssV3_1 `{'score': 7.1, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H'}`	ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}` cvssV3_1 `{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N'}`

Sep 16, 2026 3:00 PM Weaknesses updated. Affected versions updated. Scoring metrics updated View changes

Type	Values Removed	Values Added
Weaknesses		CWE-190
CPEs		cpe:2.3:o:apple:macos::::::::
Metrics		cvssV3_1 `{'score': 7.1, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H'}`

Sep 16, 2026 10:45 AM Title updated. Weaknesses updated View changes

Type	Values Removed	Values Added
Title	Integer Overflow Causing Out-of-Bounds Read in macOS Document Processing
Weaknesses	CWE-680 CWE-739

Sep 15, 2026 9:15 AM Title updated. Weaknesses updated View changes

Type	Values Removed	Values Added
Title		Integer Overflow Causing Out-of-Bounds Read in macOS Document Processing
Weaknesses		CWE-680 CWE-739

Sep 15, 2026 2:15 AM 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

Sep 14, 2026 9:00 PM Description updated. Added references View changes

Type	Values Removed	Values Added
Description		An integer overflow was addressed with improved input validation. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7. Processing a maliciously crafted document may lead to an out-of-bounds read.
References		https://support.apple.com/en-us/149035 https://support.apple.com/en-us/149042 https://support.apple.com/en-us/149043