CVE-2025-58187: Golang Go

High severity, CVSS 7.5. EPSS: 0.4% chance of exploitation in the next 30 days.

Due to the design of the name constraint checking algorithm, the processing time of some inputs scale non-linearly with respect to the size of the certificate. This affects programs which validate arbitrary certificate chains.

Affected products

• Golang Go: before 1.24.9 (fixed in 1.24.9); from 1.25.0, before 1.25.3 (fixed in 1.25.3)

Published 2025-10-29. Last modified 2026-10-08.