CVE-2026-32281: Golang Go

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

Validating certificate chains which use policies is unexpectedly inefficient when certificates in the chain contain a very large number of policy mappings, possibly causing denial of service. This only affects validation of otherwise trusted certificate chains, issued by a root CA in the VerifyOptions.Roots CertPool, or in the system certificate pool.

Affected products

• Golang Go: before 1.25.9 (fixed in 1.25.9); from 1.26.0, before 1.26.2 (fixed in 1.26.2)

Published 2026-04-08. Last modified 2026-07-25.