What is CVE-2026-45591?

CVE-2026-45591 is a high-severity vulnerability in Apple macOS, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2026-06-09.

How severe is CVE-2026-45591?

High severity. CVSS v3 base score is 7.5 out of 10.

Resource exhaustion in Apple macOS

CVE-2026-45591

Uncontrolled resource consumption in ASP.NET Core allows an unauthorized attacker to deny service over a network.

Vulnerability class: DoS (Denial of Service)

Published 2026-06-09 · last modified 2026-07-23.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.024 (83.7th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 84th percentile — 83.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.025 · newest: 0.024 · change: -0.000

Affected products

Apple macOS
Linux Kernel
Microsoft Asp.net Core
Microsoft Asp.net Core 10.0 — versions 10.0
Microsoft Asp.net Core 8.0 — versions 8.0
Microsoft Asp.net Core 9.0 — versions 9.0
Microsoft Visual Studio 2026 Version 18.6 — versions 18.6.0
Microsoft .Net
Microsoft .Net 10.0 — versions 10.0.0
Microsoft .Net 8.0 — versions 8.0.0

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-45591?: CVE-2026-45591 is a high-severity vulnerability in Apple macOS, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2026-06-09.
How severe is CVE-2026-45591?: High severity. CVSS v3 base score is 7.5 out of 10.