Read the docs
TI-2020-03341 Aliases CVE-2020-3839GHSA-3f62-5j9w-457w

Improper input validation in Apple macOS

Priority LOW 25CWE-20Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

A validation issue was addressed with improved input sanitization. This issue is fixed in macOS Catalina 10.15.3. An application may be able to read restricted memory.

Why it matters now

EPSS 0.00345 28th percentileScored 2026-11-07
Fix Fixed macOS (Apple): macOS Catalina 10.15.3

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
ApplemacOSbefore macOS Catalina 10.15.3macOS Catalina 10.15.3Patch availableCNA
  • macOS VendorApple Affected before macOS Catalina 10.15.3 Fixed in macOS Catalina 10.15.3 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*before 10.15.3VulnerableApple
  • cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:* Versions before 10.15.3 Vulnerable ·Apple

Remediation

  • Fix · CNA macOS (Apple) Fixed in macOS Catalina 10.15.3

Fixed in the same release

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

  • Release ·

    Apple macOS macOS Catalina 10.15.3

    23 records Highest priority Priority CRITICAL 1 CRITICAL, 1 MEDIUM, 21 LOW

    Other records, highest priority first

    Show all 23 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-3839
  2. 2026-10-03 Alias added: GHSA-3f62-5j9w-457w

References

Advisory 1

  • TI-2021-01573 Apple iOS and iPadOS: A remote attacker may be able to cause arbitrary code execution KEVCVSS 3.1CRITICAL 9.8
  • TI-2021-01572 Apple iOS and iPadOS: A remote attacker may be able to cause arbitrary code execution KEVCVSS 3.1CRITICAL 9.8
  • TI-2014-05975 GNU Bash through 4.3 bash43-025 processes trailing strings after certain malformed… KEVCVSS 3.1CRITICAL 9.8
  • TI-2014-05157 GNU Bash through 4.3 processes trailing strings after function definitions in the values… KEVCVSS 3.1CRITICAL 9.8
  • TI-2012-01607 sapi/cgi/cgi_main.c in PHP before 5.3.12 and 5.4.x before 5.4.2, when configured as a CGI… KEVCVSS 3.1CRITICAL 9.8
  • TI-2022-02117 Out-of-bounds write in Google Chrome KEVCVSS 3.1HIGH 8.8
See all 3209 →

Sources

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