What is CVE-2026-86874?

CVE-2026-86874 is a low-severity vulnerability in Apple Xcode, classified under Out-of-bounds Read. CVSS score: 3.3/10. Published 2026-10-20.

How severe is CVE-2026-86874?

Low severity. CVSS v3 base score is 3.3 out of 10.

Out-of-bounds Read in Apple Xcode

CVE-2026-86874

An out-of-bounds read was addressed with improved input validation. This issue is fixed in Xcode 27. Parsing a maliciously crafted binary may lead to unexpected tool termination.

Vulnerability class: Buffer Overflow

Published 2026-10-20 · last modified 2026-10-20.

CVSS v3 metric

CVSS v3 base score 3.3 (Low). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Apple Xcode

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

support.apple.com/en-us/149040

Frequently asked questions

What is CVE-2026-86874?: CVE-2026-86874 is a low-severity vulnerability in Apple Xcode, classified under Out-of-bounds Read. CVSS score: 3.3/10. Published 2026-10-20.
How severe is CVE-2026-86874?: Low severity. CVSS v3 base score is 3.3 out of 10.