Out-of-bounds Read in Apple Xcode

CVE-2026-28890

An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in Xcode 26.4. An app may be able to cause unexpected system termination.

Vulnerability class: Buffer Overflow

Published · last modified .

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:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.001 (2.6th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 3rd percentile — 2.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-28890: held from 0.001 to 0.001.

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

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-28890?
CVE-2026-28890 is a medium-severity vulnerability in Apple Xcode, classified under Out-of-bounds Read. CVSS score: 5.5/10. Published 2026-03-25.
How severe is CVE-2026-28890?
Medium severity. CVSS v3 base score is 5.5 out of 10.