CVE-2026-42790: nameConstraints DNS bypass via subject CommonName fallback in public_key hostname verification

Overview

Severity

N/A

Exploit Status

Not Exploited

Patch Tuesday

2026-May

Released

2026-05-31

Last Updated

2026-06-09

EPSS Score

0.34% (percentile: 27.1%)

Affected Products (1)

Other

• 21268-17084

Revision History

• 2026-05-31: Information published.
• 2026-06-01: Information published.
• 2026-06-09: Information published.