What is CVE-2026-20623?

CVE-2026-20623 is a medium-severity vulnerability in Apple macOS, classified under Information Disclosure. CVSS score: 5.5/10. Published 2026-02-11.

How severe is CVE-2026-20623?

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

Information disclosure in Apple macOS

CVE-2026-20623

A permissions issue was addressed by removing the vulnerable code. This issue is fixed in macOS Sequoia 15.7.4, macOS Tahoe 26.3. An app may be able to access protected user data.

Vulnerability class: Information Disclosure

Published 2026-02-11 · last modified 2026-08-21.

CVSS v3 metric

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

EPSS exploit prediction

EPSS: 0.001 (2.8th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 3rd percentile — 2.8% 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-200 — Information Disclosure

References

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

Frequently asked questions

What is CVE-2026-20623?: CVE-2026-20623 is a medium-severity vulnerability in Apple macOS, classified under Information Disclosure. CVSS score: 5.5/10. Published 2026-02-11.
How severe is CVE-2026-20623?: Medium severity. CVSS v3 base score is 5.5 out of 10.