---
title: "CVE-2026-43815: Apple macOS - Buffer Overflow"
description: "Apple macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, and macOS Tahoe 26.6 contain a buffer overflow caused by insufficient bounds checking in AFPFS connection, letting attackers cause kernel memory corruption by connecting to a malicious AFPFS server, exploit requires attacker to control AFPFS server."
url: https://panop.io/threat-heartbeat/CVE-2026-43815/
---

# CVE-2026-43815 Apple macOS - Buffer Overflow

Apple macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, and macOS Tahoe 26.6 contain a buffer overflow caused by insufficient bounds checking in AFPFS connection, letting attackers cause kernel memory corruption by connecting to a malicious AFPFS server, exploit requires attacker to control AFPFS server.

CVSS base score 8.8 /10

High

CISA KEV

Not listed

Public exploit

None known

EPSS

0.48% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-43815)

## Details

Type

Buffer Overflow

Impact

Privilege Escalation, Denial Of Service

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Published

14 September 2026

Updated

15 October 2026

Weakness

[CWE-787](https://cwe.mitre.org/data/definitions/787.html)

## Vendor fix

Update to macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-43815](https://nvd.nist.gov/vuln/detail/CVE-2026-43815)
- [https://support.apple.com/en-us/128071](https://support.apple.com/en-us/128071)
- [https://support.apple.com/en-us/128072](https://support.apple.com/en-us/128072)
- [https://support.apple.com/en-us/128067](https://support.apple.com/en-us/128067)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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