What is CVE-2026-20602?

CVE-2026-20602 is a medium-severity vulnerability in Apple macOS, classified under Uncontrolled Resource Consumption. CVSS score: 5.5/10. Published 2026-02-11.

How severe is CVE-2026-20602?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Resource exhaustion in Apple macOS

CVE-2026-20602

The issue was addressed with improved handling of caches. This issue is fixed in macOS Sequoia 15.7.4, macOS Sonoma 14.8.4, macOS Tahoe 26.3. An app may be able to cause a denial-of-service.

Vulnerability class: DoS (Denial of Service)

Published 2026-02-11 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.001 (3.3th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 3rd percentile — 3.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: +0.000

Affected products

Apple macOS — versions 0

Weakness classification (CWE)

CWE-400 — Uncontrolled Resource Consumption

References

support.apple.com/en-us/126348 (Release Notes, Vendor Advisory)
support.apple.com/en-us/126349 (Release Notes, Vendor Advisory)
support.apple.com/en-us/126350 (Release Notes, Vendor Advisory)

Frequently asked questions

What is CVE-2026-20602?: CVE-2026-20602 is a medium-severity vulnerability in Apple macOS, classified under Uncontrolled Resource Consumption. CVSS score: 5.5/10. Published 2026-02-11.
How severe is CVE-2026-20602?: Medium severity. CVSS v3 base score is 5.5 out of 10.