Description
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.
Published: 2026-04-08
Score: 7.5 High
EPSS: < 1% Very Low
KEV: No
Impact: Denial of Service via certificate chain policy processing
Action: Update Library
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Remediation

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History

Thu, 16 Apr 2026 19:30:00 +0000

Type Values Removed Values Added
First Time appeared Golang
Golang go
Weaknesses CWE-295
CPEs cpe:2.3:a:golang:go:*:*:*:*:*:*:*:*
Vendors & Products Golang
Golang go

Mon, 13 Apr 2026 19:15:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 5.9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}


Thu, 09 Apr 2026 08:30:00 +0000

Type Values Removed Values Added
First Time appeared Go Standard Library
Go Standard Library crypto/x509
Weaknesses CWE-770
Vendors & Products Go Standard Library
Go Standard Library crypto/x509

Thu, 09 Apr 2026 00:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-1050
References
Metrics threat_severity

None

cvssV3_1

{'score': 5.9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H'}

threat_severity

Moderate


Wed, 08 Apr 2026 20:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-770

Wed, 08 Apr 2026 01:45:00 +0000

Type Values Removed Values Added
Description 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.
Title Inefficient policy validation in crypto/x509
References

Subscriptions

Go Standard Library Crypto/x509
Golang Go
cve-icon MITRE

Status: PUBLISHED

Assigner: Go

Published:

Updated: 2026-04-13T18:19:44.779Z

Reserved: 2026-03-11T16:38:46.556Z

Link: CVE-2026-32281

cve-icon Vulnrichment

Updated: 2026-04-13T17:52:33.394Z

cve-icon NVD

Status : Analyzed

Published: 2026-04-08T02:16:03.350

Modified: 2026-04-16T19:15:57.750

Link: CVE-2026-32281

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-04-08T01:06:58Z

Links: CVE-2026-32281 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-04-17T09:30:14Z

Weaknesses