Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-43815

CVE-2026-43815HIGH

Apple macOS — A buffer overflow was addressed with improved bounds checking.

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   R  U  H  H  H    8.8   .0048   39.2     —

AFFECTED
  Product  Versions     Fixed
  macOS    unspecified  —

TIMELINE
  May 1   Reserved by apple
  Sep 14  Published (CNA: apple)
  Sep 16  ENRICHED — CVE-2026-43815 (Apple macOS). Received CVSS 8.8 and CPE data from NVD.

CWE-787 · CNA: apple · CVSS v3.1 · 3 references · NVD status: Modified

Description

A buffer overflow was addressed with improved bounds checking. This issue is fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6. Connecting to a malicious afpfs server may lead to kernel memory corruption.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
May 1, 2026	Reserved	Reserved by apple
September 14, 2026	Published	Published (CNA: apple)
September 16, 2026	ENRICHED	ENRICHED — CVE-2026-43815 (Apple macOS). Received CVSS 8.8 and CPE data from NVD.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
Apple	macOS	—	—	—

Weaknesses

CWE-787

References (3)

https://support.apple.com/en-us/128067 [Release Notes, Vendor Advisory]
https://support.apple.com/en-us/128071 [Release Notes, Vendor Advisory]
https://support.apple.com/en-us/128072 [Release Notes, Vendor Advisory]

Authoritative record: CVE-2026-43815 at cve.org

Vendors: apple

Weaknesses: CWE-787

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-43815 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.