What is CVE-2026-32281?

CVE-2026-32281 is a high-severity vulnerability in Golang Go, classified under Improper Certificate Validation. CVSS score: 7.5/10. Published 2026-04-08.

How severe is CVE-2026-32281?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Golang Go

CVE-2026-32281

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.

Vulnerability class: Improper Certificate Validation

EPSS: 0.004 (28.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Golang Go
Go Standard Library Crypto/x509 — versions 0, 1.26.0-0

Weakness classification (CWE)

CWE-295 — Improper Certificate Validation

References

security@golang.org (Patch)
security@golang.org (Issue Tracking)
security@golang.org (Release Notes, Issue Tracking)
security@golang.org (Vendor Advisory)

Frequently asked questions

What is CVE-2026-32281?: CVE-2026-32281 is a high-severity vulnerability in Golang Go, classified under Improper Certificate Validation. CVSS score: 7.5/10. Published 2026-04-08.
How severe is CVE-2026-32281?: High severity. CVSS v3 base score is 7.5 out of 10.