Read the docs
TI-2026-76694 Aliases CVE-2026-86948GHSA-79mp-j3j2-g5p4

Sandbox escape in Apple Xcode caused by library validation flaw

Priority LOW 39CWE-284Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Security bypass, Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-284 and CWE-829.

Summary

Apple Xcode before 27 has a flaw in which affected binaries do not enforce library validation, classified as CWE-693. A local attacker with low privileges can break out of an app's sandbox without user interaction, with high impact on confidentiality, integrity and availability.

Written with Claude Haiku 5.5 from the sources below · 2026-10-30

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00143 3rd percentileScored 2026-11-07
Fix Fixed Xcode (Apple): 27

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
AppleXcodebefore 2727Patch availableCNA
  • Xcode VendorApple Affected before 27 Fixed in 27 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:apple:xcode:*:*:*:*:*:*:*:*before 27.0VulnerableApple
  • cpe:2.3:a:apple:xcode:*:*:*:*:*:*:*:* Versions before 27.0 Vulnerable ·Apple

Remediation

Update Apple Xcode to version 27, which fixes the issue.

Written with Claude Haiku 5.5 from the sources below · 2026-10-30

  • Fix · CNA Xcode (Apple) Fixed in 27

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Apple Xcode 27

    4 records Highest priority Priority LOW 4 LOW

    Other records, highest priority first

    • TI-2026-76695 Apple Xcode flaw lets malicious apps break out of sandboxPriority LOW 39
    • TI-2026-76679 Improper input validation in Apple Xcode lets crafted binaries crash the appPriority LOW 20
    • TI-2026-76678 Out-of-bounds read in Apple Xcode crashes tools parsing binariesPriority LOW 15
    Show all 4 records →

Timeline

  1. 2026-10-20 Threatist record created from CVE-2026-86948
  2. 2026-10-21 CISA SSVC decision points changed
  3. 2026-10-29 CVSS score added · NVD
  4. 2026-10-29 Weakness changed · NVD
  5. 2026-10-29 Alias added: GHSA-79mp-j3j2-g5p4
  6. 2026-10-30 CVSS score added · CISA ADP
  7. 2026-10-30 Weakness changed · CISA ADP
  8. 2026-10-30 CISA SSVC decision points changed

References

Advisory 1

  • TI-2021-19919 Apache Log4j2 JNDI features do not protect against attacker controlled LDAP and other JNDI related endpoints KEVCVSS 3.1CRITICAL 10.0
  • TI-2025-30709 Git allows arbitrary code execution through broken config quoting KEVCVSS 3.1HIGH 8.1
  • TI-2004-02557 distcc 2.x, as used in XCode 1.5 and others, when not configured to restrict access to… CVSS 2.0HIGH 9.3
  • TI-2014-07619 Git before 1.8.5.6, 1.9.x before 1.9.5, 2.0.x before 2.0.5, 2.1.x before 2.1.4, and 2.2.x… CVSS 3.1CRITICAL 9.8
  • TI-2021-04400 malicious repositories can execute remote code while cloning CVSS 3.1HIGH 8.0
  • TI-2016-00666 The resolver in nginx before 1.8.1 and 1.9.x before 1.9.10 allows remote attackers to… CVSS 3.1HIGH 7.5
See all 99 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences