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TI-2026-76654 Aliases CVE-2026-28854GHSA-4w84-q78m-3mfj

Apple macOS may launch maliciously modified apps

Priority LOW 38CWE-353Published · Updated

Key facts

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

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

Summary

Apple macOS before 27 does not properly validate app bundle integrity, so a maliciously modified app may not be prevented from launching. The flaw is an improper validation of an integrity check value (CWE-354). An attacker with network access and no privileges or user interaction can cause this, with high impact to integrity.

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

Description from the CNA

The issue was addressed with additional app bundle integrity checks. This issue is fixed in macOS Golden Gate 27. A maliciously modified app may not be prevented from launching.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00179 7th percentileScored 2026-11-07
Fix Fixed macOS (Apple): 27

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
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
ApplemacOSbefore 2727Patch availableCNA
  • macOS VendorApple Affected before 27 Fixed in 27 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*before 27.0VulnerableApple
  • cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* Versions before 27.0 Vulnerable ·Apple

Remediation

Update Apple macOS to macOS Golden Gate 27, the fixed version listed for this issue.

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

  • Fix · CNA macOS (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 macOS 27

    16 records Highest priority Priority MEDIUM 1 MEDIUM, 15 LOW

    Other records, highest priority first

    • TI-2026-76687 Type confusion in Apple Safari and iOS allows code executionPriority MEDIUM 40
    • TI-2026-76700 Race condition in Apple iOS, iPadOS and macOS lets apps escape sandboxPriority LOW 35
    • TI-2026-76686 Apple iOS and macOS permissions flaw lets attackers overwrite filesPriority LOW 27
    Show all 16 records →

Timeline

  1. 2026-10-20 Threatist record created from CVE-2026-28854
  2. 2026-10-29 CVSS score added · CISA ADP
  3. 2026-10-29 Weakness changed · CISA ADP
  4. 2026-10-29 CISA SSVC decision points changed
  5. 2026-10-29 CVSS score added · NVD
  6. 2026-10-29 Weakness changed · NVD
  7. 2026-10-29 Alias added: GHSA-4w84-q78m-3mfj

References

Advisory 1

  • TI-2026-46583 Improper authentication in Apple macOS KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-28008 Out-of-bounds write in Apple iOS and iPadOS KEVCVSS 3.1CRITICAL 10.0
  • TI-2025-22441 Apple iOS and iPadOS: An attacker with arbitrary read and write capability may be able to… KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-22440 Memory corruption in Apple iOS and iPadOS KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-17951 Out-of-bounds write in Apple Safari KEVCVSS 3.1CRITICAL 10.0
  • TI-2025-17847 Use after free in Apple iOS and iPadOS KEVCVSS 3.1CRITICAL 10.0
See all 3490 →

Sources

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