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TI-2026-76678 Aliases CVE-2026-86874GHSA-w4xm-25jx-vjc8

Out-of-bounds read in Apple Xcode crashes tools parsing binaries

Priority LOW 15CWE-125Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · None · Low
Fix status
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA.

Summary

Apple Xcode before 27 contains an out-of-bounds read (CWE-125) caused by insufficient input validation. A local attacker with low privileges can supply a maliciously crafted binary that, when parsed, unexpectedly terminates the tool. The impact is limited to availability.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00155 4th percentileScored 2026-11-07
Fix Fixed Xcode (Apple): 27

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

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

Upgrade Apple Xcode to version 27, which fixes this issue.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

  • 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-2026-76694 Sandbox escape in Apple Xcode caused by library validation flawPriority LOW 39
    • TI-2026-76679 Improper input validation in Apple Xcode lets crafted binaries crash the appPriority LOW 20
    Show all 4 records →

Timeline

  1. 2026-10-20 Threatist record created from CVE-2026-86874
  2. 2026-10-20 CVSS score added · CISA ADP
  3. 2026-10-20 Weakness changed · CISA ADP
  4. 2026-10-20 CISA SSVC decision points changed
  5. 2026-10-20 Alias added: GHSA-w4xm-25jx-vjc8

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