CVE-2026-32281

Inefficient policy validation in crypto/x509

Published Apr 8, 2026 CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
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
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'}

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
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

Type Values Removed Values Added
Weaknesses CWE-770
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
Weaknesses

Sources

Status
PUBLISHED
Assigner
Go
Published
Updated
Apr 13, 2026, 6:19 PM
Reserved
Mar 11, 2026, 4:38 PM
Status
Analyzed
Published
Apr 8, 2026, 2:16 AM
Modified
Jul 25, 2026, 10:10 AM
Severity
Moderate
Public date
Apr 8, 2026, 1:06 AM