TI-2026-80717 Aliases CVE-2026-86943 GHSA-wmjr-2f9h-4mwj

Memory handling flaw in Apple macOS allows remote denial of service

MEDIUM 40CWE-119Published 2026-10-26 · Updated 2026-11-04

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-119 and the CVSS impact.

Summary

Apple macOS before 27.2 contains a memory buffer flaw, tracked as CWE-119, that the vendor addressed with improved memory handling. A remote attacker with no privileges and no user interaction can cause a denial of service.

Written with Claude Haiku 5.5 from the sources below · 2026-11-04

Description from the CNA

The issue was addressed with improved memory handling. This issue is fixed in macOS Golden Gate 27.2. A remote attacker may be able to cause a denial-of-service.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00541 45th percentileScored 2026-11-07

Fix Fixed macOS (Apple): 27.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Apple	macOS	before 27.2	27.2	Patch available	CNA

macOS VendorApple Affected before 27.2 Fixed in 27.2 Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:o:apple:macos::::::::	before 27.2	Vulnerable	Apple

cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* Versions before 27.2 Vulnerable ·Apple

Remediation

Apple fixes this issue in macOS 27.2, so update macOS to version 27.2.

Written with Claude Haiku 5.5 from the sources below · 2026-11-04

Fix · CNA macOS (Apple) Fixed in 27.2

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Release · 2026-10-26
Apple macOS 27.2
78 records Highest priority Priority MEDIUM 23 MEDIUM, 55 LOW
Other records, highest priority first
- TI-2026-80671 Sandbox escape in Apple Safari and other Apple platformsPriority MEDIUM 50
- TI-2026-80835 Out-of-bounds read in Apple iOS, iPadOS and macOS may leak memoryPriority MEDIUM 42
- TI-2026-80618 Memory corruption in Apple platforms via crafted video filePriority MEDIUM 42
Show all 78 records →

Timeline

2026-10-26 Threatist record created from CVE-2026-86943
2026-10-27 Alias added: GHSA-wmjr-2f9h-4mwj
2026-11-04 CVSS score added · CISA ADP
2026-11-04 Weakness changed · CISA ADP
2026-11-04 CISA SSVC decision points changed
2026-11-06 Priority changed: LOW → MEDIUM

References

Advisory 1

https://support.apple.com/en-us/149521

TI-2026-46583 Improper authentication in Apple macOS KEVCVSS 3.1CRITICAL 9.8
TI-2025-28008 Out-of-bounds write in Apple iOS and iPadOS KEVCVSS 3.1CRITICAL 10.0
TI-2025-22441 Apple iOS and iPadOS: An attacker with arbitrary read and write capability may be able to… KEVCVSS 3.1CRITICAL 9.8
TI-2025-22440 Memory corruption in Apple iOS and iPadOS KEVCVSS 3.1CRITICAL 9.8
TI-2025-17951 Out-of-bounds write in Apple Safari KEVCVSS 3.1CRITICAL 10.0
TI-2025-17847 Use after free in Apple iOS and iPadOS KEVCVSS 3.1CRITICAL 10.0

See all 3490 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences