What is CVE-2026-86949?

CVE-2026-86949 is a high-severity vulnerability in Apple Xcode, classified under Inclusion of Functionality from Untrusted Control Sphere. CVSS score: 8.8/10. Published 2026-10-20.

How severe is CVE-2026-86949?

High severity. CVSS v3 base score is 8.8 out of 10.

Vulnerability in Apple Xcode

CVE-2026-86949

This issue was addressed by enforcing library validation on the affected binaries. This issue is fixed in Xcode 27. A malicious app may be able to break out of its sandbox.

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

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

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-829 — Inclusion of Functionality from Untrusted Control Sphere

References

support.apple.com/en-us/149040

Frequently asked questions

What is CVE-2026-86949?: CVE-2026-86949 is a high-severity vulnerability in Apple Xcode, classified under Inclusion of Functionality from Untrusted Control Sphere. CVSS score: 8.8/10. Published 2026-10-20.
How severe is CVE-2026-86949?: High severity. CVSS v3 base score is 8.8 out of 10.