CVE-2026-86949: This issue was addressed by enforcing library validation on the affected binaries

Q: How do I fix CVE-2026-86949?

xcode: upgrade to 27.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-86949 being exploited?

CVE-2026-86949 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-86949 affect?

CVE-2026-86949 affects xcode. Severity is high (CVSS 8.8). 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.

Routine

HIGH 8.8UPGRADE

CVE-2026-86949 is a high-severity flaw (CVSS 8.8) affecting xcode. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.2% (top 95%)
CISA exploited list	No
Weakness	CWE-829
Published	2026-10-20
Last modified	2026-10-29

Publisher (CNA): Apple Inc. · Vendor: apple

Last updated 2026-10-29 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-10-20 01:17 UTCPublished CVE record published
2026-10-29 15:53 UTCUpdated Record last modified

apple xcode UPGRADE

Affected: < 27.0

Fixed in: 27.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy xcode || rpm -q xcode || xcode --version

2. UPGRADE to 27.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade xcode

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade xcode

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-86949?

xcode: upgrade to 27.0. Exact commands for each OS are on this page.

Is CVE-2026-86949 being exploited?

CVE-2026-86949 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-86949 affect?

CVE-2026-86949 affects xcode. Severity is high (CVSS 8.8). 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.

How urgent is CVE-2026-86949?

Priority 32/100. High severity

Related CVEs

CVE-2026-86948 HIGH 8.8 UPGRADE This issue was addressed by enforcing library validation on the affected binaries
CVE-2026-86874 LOW 3.3 UPGRADE An out-of-bounds read was addressed with improved input validation
CVE-2026-86875 MEDIUM 4.3 UPGRADE An input validation issue was addressed with improved input validation
CVE-2025-43505 HIGH 8.8 UPGRADE An out-of-bounds write issue was addressed with improved input validation
CVE-2025-43504 MEDIUM 4.9 UPGRADE A buffer overflow was addressed with improved bounds checking

References

← Back to latest CVEs