CVE-2026-20603 Information disclosure in macOS

What is CVE-2026-20603?

CVE-2026-20603 is a medium-severity vulnerability in Apple Macos, published on 11 Feb 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

This issue was addressed with improved redaction of sensitive information. This issue is fixed in macOS Tahoe 26.3. An app with root privileges may be able to access private information.

Weakness: CWE-284

Which versions are affected by CVE-2026-20603?

It affects 1 product.

Products include Apple Macos.

How do I fix CVE-2026-20603?

No fix has been published for CVE-2026-20603 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-20603 being exploited?

There is no known exploitation of CVE-2026-20603 in the wild and no public exploit code.

Other vulnerabilities in Apple Macos

• CVE-2026-65400 Apple macOS Improper Authentication Exploited Critical 9.8
• CVE-2024-44146 Security feature bypass in macOS Critical 10.0
• CVE-2024-44148 Security feature bypass in macOS Critical 10.0
• CVE-2023-38586 Security feature bypass in macOS Critical 10.0
• CVE-2023-40455 Security feature bypass in macOS Critical 10.0

All Apple Macos vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-hr8m-gc74-4f7w.