No exploitation reportedFix available

CVE-2026-86948

Q: Is CVE-2026-86948 actively exploited?

Active exploitation of CVE-2026-86948 has not been confirmed. Its EPSS score was 0.2% on 2026-10-29, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2026-86948?

CVE-2026-86948 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

Xcode 27 Library Validation Missing Leading to Sandbox Escape

No exploitation reported by the sources we read.

Published2026-10-20
Fixed in27.0
WeaknessCWE-829

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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

Timeline

dates in UTC

2026-10-2001:17CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-30 09:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-86948?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-86948?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Apple xcode

Branch	Affected	Fixed in	Source
27.0	< 27.0	27.0	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Update Apple xcode to 27.0

Advisories and patches

support.apple.comVendor Advisory · Release Notes

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

CISA-ADPSSVC decisionnone2026-10-20
OpenCVESSVC decisionnone—
NVDCVSS 3.18.8read 2026-10-30
NVDweakness (CWE)CWE-829read 2026-10-30
FIRST EPSSEPSS score0.2 %2026-10-29

Technical details

CVSS v3 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Published: 2026-10-20
Last Modified: 2026-10-29
NVD status: Analyzed

Frequently asked questions

What is CVE-2026-86948?

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

Is CVE-2026-86948 actively exploited?

Active exploitation of CVE-2026-86948 has not been confirmed. Its EPSS score was 0.2% on 2026-10-29, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-86948?

CVE-2026-86948 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

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