CVE-2026-32281: Inefficient policy validation in crypto/x509

Published Apr 8, 2026
·
Updated

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 Software

3 affected components
go crypto/x509
Golang Go<1.25.9
Golang Go>=1.26.0<1.26.2

Remediation

Patch Available

https://go.dev/cl/758061

Event History

Apr 8, 2026
CVE Published
via MITRE·01:06 AM
Data Sourced
via MITRE·01:06 AM
DescriptionWeakness
Data Sourced
via Red Hat·02:01 AM
DescriptionSeverityAffected Software
Data Sourced
via NVD·02:16 AM
RemedyDescriptionSeverityWeaknessAffected Software
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Frequently Asked Questions

1

What is the severity of CVE-2026-32281?

CVE-2026-32281 is considered a denial of service vulnerability due to inefficient policy validation in the Go crypto/x509 library.

2

How do I fix CVE-2026-32281?

To fix CVE-2026-32281, upgrade to Go version 1.26.2 or later, as previous versions contain the vulnerability.

3

What software is affected by CVE-2026-32281?

CVE-2026-32281 affects the Go crypto/x509 library, specifically versions prior to 1.26.2 and those up to 1.25.9.

4

How can CVE-2026-32281 impact my application?

CVE-2026-32281 can cause denials of service due to inefficient validation of certificate chains with many policy mappings.

5

Is there a workaround for CVE-2026-32281 before upgrading?

There are no officially recommended workarounds for CVE-2026-32281, so upgrading to a patched version is advised.

Company

Resources

Contact

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