--- id: CVE-2026-32281 aliases: - GO-2026-4946 - BIT-golang-2026-32281 title: Inefficient policy validation in crypto/x509 summary: Inefficient policy validation in crypto/x509 severity: medium cvss: 5.9 cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H' vendor: stdlib product: stdlib ecosystem: go affected: - 'stdlib >= 1.26.0-0, < 1.26.2' patched: - stdlib 1.26.2 published: '2026-04-07' updated: '2026-10-03' sourceUpdated: '2026-10-03T10:41:52.434115228Z' source: OSV sourceUrl: 'https://osv.dev/vulnerability/GO-2026-4946' references: - url: 'https://go.dev/cl/758061' - url: 'https://go.dev/issue/78281' - url: 'https://groups.google.com/g/golang-announce/c/0uYbvbPZRWU' - url: >- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-32281.json - url: 'https://access.redhat.com/security/cve/CVE-2026-32281' - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2456333' - url: 'https://www.cve.org/CVERecord?id=CVE-2026-32281' - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-32281' - url: 'https://pkg.go.dev/vuln/GO-2026-4946' - url: 'https://access.redhat.com/errata/RHSA-2026:42079' - url: 'https://access.redhat.com/errata/RHSA-2026:41019' - url: 'https://access.redhat.com/errata/RHSA-2026:16101' - url: 'https://access.redhat.com/errata/RHSA-2026:42078' - url: 'https://access.redhat.com/errata/RHSA-2026:54757' - url: 'https://access.redhat.com/errata/RHSA-2026:27076' - url: 'https://access.redhat.com/errata/RHSA-2026:28010' - url: 'https://access.redhat.com/errata/RHSA-2026:36796' - url: 'https://access.redhat.com/errata/RHSA-2026:39810' - url: 'https://access.redhat.com/errata/RHSA-2026:34365' - url: 'https://access.redhat.com/errata/RHSA-2026:20569' - url: 'https://access.redhat.com/errata/RHSA-2026:23103' - url: 'https://access.redhat.com/errata/RHSA-2026:67149' - url: 'https://access.redhat.com/errata/RHSA-2026:16024' - url: 'https://access.redhat.com/errata/RHSA-2026:18032' - url: 'https://access.redhat.com/errata/RHSA-2026:18027' - url: 'https://access.redhat.com/errata/RHSA-2026:19719' - url: 'https://access.redhat.com/errata/RHSA-2026:27711' - url: 'https://access.redhat.com/errata/RHSA-2026:20570' - url: 'https://access.redhat.com/errata/RHSA-2026:22713' - url: 'https://access.redhat.com/errata/RHSA-2026:20571' - url: 'https://access.redhat.com/errata/RHSA-2026:19450' tags: - osv - go - csaf - vex - red-hat epss: 0.00355 epssPercentile: 0.29046 cvssSource: vendor cwe: - CWE-1050 ingestedAt: '2026-07-09T18:56:37.030Z' --- ## Overview 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 packages - `stdlib >= 1.26.0-0, < 1.26.2` ## Remediation Upgrade to a patched release: - `stdlib 1.26.2` ## Vendor advisories - **RHSA-2026:42079** · Red Hat · fixed in: Red Hat Ansible Automation Platform 2.6 for RHEL 10, Red Hat Ansible Automation Platform 2.6 for RHEL 9 · released 2026-07-20 · [advisory](https://access.redhat.com/errata/RHSA-2026:42079) - **RHSA-2026:41019** · Red Hat · fixed in: RHEM 1.1 for RHEL 10, RHEM 1.1 for RHEL 9 · released 2026-07-16 · [advisory](https://access.redhat.com/errata/RHSA-2026:41019) - **RHSA-2026:16101** · Red Hat · fixed in: Red Hat Enterprise Linux Server (v. 7 ELS) · released 2026-05-11 · [advisory](https://access.redhat.com/errata/RHSA-2026:16101) - **RHSA-2026:42078** · Red Hat · fixed in: Red Hat Ansible Automation Platform 2.5 for RHEL 8, Red Hat Ansible Automation Platform 2.5 for RHEL 9 · released 2026-07-20 · [advisory](https://access.redhat.com/errata/RHSA-2026:42078) - **RHSA-2026:54757** · Red Hat · fixed in: Red Hat OpenStack Platform 16.2 · released 2026-08-13 · [advisory](https://access.redhat.com/errata/RHSA-2026:54757) - **RHSA-2026:27076** · Red Hat · fixed in: Red Hat Satellite 6.16 for RHEL 8, Red Hat Satellite 6.16 for RHEL 9 · released 2026-06-18 · [advisory](https://access.redhat.com/errata/RHSA-2026:27076) - **RHSA-2026:28010** · Red Hat · fixed in: Cryostat 4 on RHEL 9 · released 2026-06-22 · [advisory](https://access.redhat.com/errata/RHSA-2026:28010) - **RHSA-2026:36796** · Red Hat · fixed in: RHEM 1.0 for RHEL 9 · released 2026-07-08 · [advisory](https://access.redhat.com/errata/RHSA-2026:36796) - **RHSA-2026:39810** · Red Hat · fixed in: Red Hat OpenStack Services on OpenShift 18.0, 9Base-RHOSO-TOOLS-18 · released 2026-07-15 · [advisory](https://access.redhat.com/errata/RHSA-2026:39810) - **RHSA-2026:34365** · Red Hat · fixed in: Red Hat Satellite 6.19 for RHEL 9 · released 2026-07-01 · [advisory](https://access.redhat.com/errata/RHSA-2026:34365) - **RHSA-2026:20569** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream EUS (v. 10.0) · released 2026-05-26 · [advisory](https://access.redhat.com/errata/RHSA-2026:20569) - **Red Hat VEX** · Moderate · affected: Assisted Installer for Red Hat OpenShift Container Platform 2, cert-manager Operator for Red Hat OpenShift, Confidential Compute Attestation, Deployment Validation Operator, External Secrets Operator for Red Hat OpenShift, ExternalDNS Operator, … · no fix planned: Confidential Compute Attestation, External Secrets Operator for Red Hat OpenShift, Gatekeeper 3, Migration Toolkit for Applications 8, … · updated 2026-10-02 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-32281.json)