CVE-2026-32281 json
Inefficient policy validation in crypto/x509
published 2026-04-07 7 mo ago modified 2026-10-03 37 d ago also BIT-golang-2026-32281 , EUVD-2026-20010 , GO-2026-4946
- cvss
- 7.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 30%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- bitnami golang 1.25.9, 1.26.2
- go stdlib 1.25.9, 1.26.2
- Go standard library crypto/x509 1.25.9, 1.26.2
- golang-1.26 Debian 14 1.26.2-1
debian advisories DEBIAN-CVE-2026-32281
- osbuild-composer RHEL 8 101.5-3.el8_10
- osbuild-composer-core RHEL 8 101.5-3.el8_10
- osbuild-composer-worker RHEL 8 101.5-3.el8_10
- image-builder RHEL 9 52.1-1.el9_8.2
- image-builder RHEL 10.2 52.1-1.el10_2.2
- etcd openstack 16.2 3.3.23-22.el8ost
- erlang openstack 16.2 23.3.4.18-2.el8ost
- erlang-ssl openstack 16.2 23.3.4.18-2.el8ost
red hat advisories RHSA-2026:72805RHSA-2026:72737RHSA-2026:72276RHSA-2026:69235RHSA-2026:68504RHSA-2026:67319
- go1.25-openssl SLES for SAP applications 16.0, SLES 16.0 1.25.12-160000.1.1
- go1.26-openssl SLES for SAP applications 16.0, SLES 16.0 1.26.4-160000.1.1
- go1.25-openssl SLES for SAP 15 SP5, SLES for SAP 15 SP4, SLES 15 SP5-LTSS +5 more 1.25.9-150000.1.21.1
- go1.26-openssl SLES for SAP 15 SP5, SLES for SAP 15 SP4, SLES 15 SP5-LTSS +5 more 1.26.2-150000.1.6.1
- go1.25 SLES for SAP 15 SP6, SLES for SAP 15 SP5, SLES for SAP 15 SP4 +8 more 1.25.9-150000.1.35.1
- go1.26 SLES for SAP 15 SP6, SLES for SAP 15 SP5, SLES for SAP 15 SP4 +8 more 1.26.2-150000.1.9.1
suse advisories SUSE-SU-2026:22638-1SUSE-SU-2026:22572-1SUSE-SU-2026:1581-1SUSE-SU-2026:1580-1SUSE-SU-2026:1321-1SUSE-SU-2026:1320-1
- govulncheck-vulndb openSUSE Leap 16.0 0.0.20260723T184607-160000.1.1
- go1.25-openssl openSUSE Leap 16.0 1.25.12-160000.1.1
- go1.26-openssl openSUSE Leap 16.0 1.26.4-160000.1.1
- go1.26 openSUSE Leap 16.0 1.26.2-160000.1.1
- go1.25 openSUSE Leap 16.0 1.25.9-160000.1.1
- go1.26 openSUSE Tumbleweed 1.26.2-1.1
- go1.25 openSUSE Tumbleweed 1.25.9-1.1
opensuse advisories openSUSE-SU-2026:21483-1openSUSE-SU-2026:21319-1openSUSE-SU-2026:21254-1openSUSE-SU-2026:20571-1openSUSE-SU-2026:20570-1openSUSE-SU-2026:10525-1
- osbuild-composer AlmaLinux 8 101.5-3.el8_10.alma.1
- osbuild-composer-core AlmaLinux 8 101.5-3.el8_10.alma.1
- osbuild-composer-worker AlmaLinux 8 101.5-3.el8_10.alma.1
- osbuild-composer AlmaLinux 9 165.1-4.el9_8.alma.1
- osbuild-composer-core AlmaLinux 9 165.1-4.el9_8.alma.1
- osbuild-composer-worker AlmaLinux 9 165.1-4.el9_8.alma.1
- osbuild-composer AlmaLinux 10 165.1-3.el10_2.1.alma.3
- osbuild-composer-core AlmaLinux 10 165.1-3.el10_2.1.alma.3
almalinux advisories ALSA-2026:67148ALSA-2026:49838ALSA-2026:49526ALSA-2026:33722ALSA-2026:29702ALSA-2026:29703
- osbuild-composer Rocky Linux 8 101.5-3.el8_10.rocky.0.6
- image-builder Rocky Linux 9 52.1-1.el9_8.2
- image-builder Rocky Linux 10 52.1-1.el10_2.2.rocky.0.1
- osbuild-composer Rocky Linux 9 165.1-4.el9_8.rocky.0.1
- osbuild-composer Rocky Linux 10 165.1-3.el10_2.1.rocky.0.1
- criu Rocky Linux 8 3.18-5.module+el8.10.0+1872+2e18eb19
- criu Rocky Linux 8 3.18-5.module+el8.10.0+1825+623b0c20
- criu Rocky Linux 8 3.18-5.module+el8.10.0+1815+5fe7415e
rocky linux advisories RLSA-2026:67148RLSA-2026:65886RLSA-2026:65534RLSA-2026:49838RLSA-2026:49526RLSA-2026:33722
- go Alpine 3.23 1.25.9-r0
- go Alpine 3.24 1.26.2-r0
- rclone Alpine 3.24 1.73.5-r0
alpine advisories ALPINE-CVE-2026-32281
Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0
- go.dev/cl/758061 patch
Vendor advisories
What the vendors themselves say about their products: affected, fixed or not affected, and what to do.
red hat product security vex CVE-2026-32281 updated cvss 5.9
crypto/x509: golang: Go crypto/x509: Denial of Service via inefficient certificate chain validation
-
Red Hat Assisted Installer for Red Hat OpenShift Container Platform 2 redhat-user-workloads/crt-nshift-appliance-tenant/appliance/appliance Red Hat cert-manager Operator for Red Hat OpenShift redhat-user-workloads/cert-manager-oape-tenant/jetstack-cert-manager-1-17/jetstack-cert-manager-1-17, redhat-user-workloads/cert-manager-oape-tenant/jetstack-cert-manager-1-18/jetstack-cert-manager-1-18 Red Hat Compliance Operator redhat-user-workloads/ocp-isc-tenant/compliance-operator-bundle-releaseaffected: workaround, no fix available
-
Red Hat Confidential Compute Attestation redhat-user-workloads/ose-osc-tenant/osc-caa, redhat-user-workloads/ose-osc-tenant/trustee/trustee-operatoraffected: workaround, no fix planned “Will not fix”
-
Red Hat Custom Metric Autoscaler operator for Red Hat Openshift redhat-user-workloads/cma-podauto-tenant/custom-metrics-autoscaler-operator/keda-adapter Red Hat Deployment Validation Operator redhat-user-workloads/dvo-obsint-tenant/deployment-validation-operator/deployment-validation-operatoraffected: workaround, no fix available
-
Red Hat External Secrets Operator for Red Hat OpenShift external-secrets-operator/external-secrets-rhel9affected: workaround, no fix planned “Will not fix”
-
Red Hat ExternalDNS Operator edo/external-dns-rhel8, edo/external-dns-rhel9 Red Hat Fence Agents Remediation Operator workload-availability/fence-agents-remediation-rhel8-operator Red Hat File Integrity Operator redhat-user-workloads/ocp-isc-tenant/file-integrity-operator-releaseaffected: workaround, no fix available
-
Red Hat Gatekeeper 3 redhat-user-workloads/gatekeeper-tenant/gatekeeper-operator-3-18/gatekeeper-operator-3-18affected: workaround, no fix planned “Will not fix”
-
Red Hat Logging Subsystem for Red Hat OpenShift redhat-user-workloads/obs-logging-tenant/logging-loki-v6-0, redhat-user-workloads/obs-logging-tenant/logging-loki-v6-2, redhat-user-workloads/obs-logging-tenant/logging-loki-v6-4 Red Hat Machine Deletion Remediation Operator workload-availability/machine-deletion-remediation-rhel8-operatoraffected: workaround, no fix available
-
Red Hat Migration Toolkit for Applications 8 redhat-user-workloads/ocp-art-tenant/art-imagesaffected: workaround, no fix planned “Will not fix”
show 7 moreshow fewer
-
Red Hat Migration Toolkit for Containers redhat-user-workloads/ocp-art-tenant/art-images Red Hat mirror registry for Red Hat OpenShift 2 redhat-user-workloads/quay-eng-tenant/mirror-registry-v2-0 Red Hat Multiarch Tuning Operator redhat-user-workloads/multiarch-tuning-ope-tenant/multiarch-tuning-operator-v1-x/multiarch-tuning-operator-v1-x Red Hat Multicluster Engine for Kubernetes redhat-user-workloads/crt-redhat-acm-tenant/kube-rbac-proxy-mce-28, redhat-user-workloads/crt-redhat-acm-tenant/kube-rbac-proxy-mce-29, redhat-user-workloads/crt-redhat-acm-tenant/kube-rbac-proxy-mce-210, redhat-user-workloads/crt-redhat-acm-tenant/kube-rbac-proxy-mce-211, redhat-user-workloads/crt-redhat-acm-tenant/image-based-install-operator-mce-26, redhat-user-workloads/crt-redhat-acm-tenant/image-based-install-operator-mce-27 Red Hat Multicluster Global Hub multicluster-globalhub/multicluster-globalhub-agent-rhel8, multicluster-globalhub/multicluster-globalhub-agent-rhel9 Red Hat Network Observability Operator redhat-user-workloads/ocp-network-observab-tenant/flowlogs-pipeline-zstreamaffected: workaround, no fix available
+8 more productsfewer
Red Hat Node HealthCheck Operator node-healthcheck-operator-tech-preview/node-healthcheck-operator-rhel8, node-healthcheck-operator-tech-preview/node-healthcheck-rhel8-operator Red Hat OpenShift API for Data Protection redhat-user-workloads/ocp-art-tenant/art-images Red Hat OpenShift Developer Tools and Services helm Red Hat OpenShift Pipelines openshift-pipelines-client Red Hat OpenShift Serverless kn-workflow-plugin, openshift-serverless-clients, redhat-user-workloads/ocp-serverless-tenant/serverless-operator-137/kn-plugin-event-sender Red Hat OpenShift Service Mesh 2 redhat-user-workloads/service-mesh-tenant/kiali-2-6 Red Hat OpenShift Service Mesh 3 redhat-user-workloads/service-mesh-tenant/kiali-3-0, redhat-user-workloads/service-mesh-tenant/kiali-3-1, redhat-user-workloads/service-mesh-tenant/kiali-3-2, redhat-user-workloads/service-mesh-tenant/kiali-3-3 Red Hat Power monitoring for Red Hat OpenShift redhat-user-workloads/rhpm-tenant/kepler -
Red Hat 3scale API Management Platform 2 3scale-amp2/3scale-rhel9-operatoraffected: workaround, no fix planned “Will not fix”
-
Red Hat Advanced Cluster Management for Kubernetes 2 redhat-user-workloads/volsync-tenant/volsync-0-13, redhat-user-workloads/volsync-tenant/volsync-0-14, redhat-user-workloads/volsync-tenant/volsync-0-15affected: workaround, no fix available, no fix planned “Will not fix”
-
Red Hat Advanced Cluster Security 4 rhacs-eng/release-main Red Hat AMQ Broker 7 amq7/amq-broker-rhel9-operator Red Hat Ansible Automation Platform 2 redhat-user-workloads/ansible-sre-tenant/aoc-azure-aap-installer-container Red Hat build of Apache Camel - HawtIO 4 rhbac-4/hawtio-rhel8-operator, rhbac-4/hawtio-rhel9-operatoraffected: workaround, no fix available
-
Red Hat build of Apicurio Registry 2 apicurio/apicurio-registry-rhel8-operator, apicurio/apicurio-registry-rhel9-operatoraffected: workaround, no fix planned “Will not fix”
-
Red Hat Certification Program for Red Hat Enterprise Linux 9 redhat-certification-preflight Red Hat Connectivity Link 1 redhat-user-workloads/api-management-tenant/rhcl-1-3-coredns Red Hat Edge Manager 1 redhat-user-workloads/edge-manager-tenant/flightctl/flightctl-uiaffected: workaround, no fix available
-
Red Hat Enterprise Linux 8 delve, golang, git-lfs, grafana, go-toolset, golang-bin, +18 more Red Hat Enterprise Linux 9 grafana, toolbox, ignition, go-toolset, grafana-pcp, ignition-edge, +7 moreaffected: workaround, no fix available, no fix planned “Will not fix”
23 more affected, 91 more fixed, 87 more not affected in the full advisory
Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 6 mo ago
Exploit prediction
0.36% chance of exploitation in the next 30 days, higher than 30% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| OSV | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| bitnami | golang | <1.25.9 >=1.26.0-0, <1.26.2 |
1.25.9 1.26.2 |
| go | stdlib | <1.25.9 >=1.26.0-0, <1.26.2 |
1.25.9 1.26.2 |
Affected products
- Go standard library crypto/x509
Classification
- Weakness
-
- CWE-295 Improper Certificate Validation
References
-
go.dev
/cl/758061
patch
-
pkg.go.dev
/vuln/GO-2026-4946
vendor-advisory, advisory
-
go.dev
/issue/78281
issue-tracking, report
-
groups.google.com
/g/golang-announce/c/0uYbvbPZRWU
issue-tracking, release-notes, report, web
-
nvd.nist.gov
/vuln/detail/CVE-2026-32281
web
Sources
- CVE List CVE-2026-32281
- NVD CVE-2026-32281
- OSV BIT-golang-2026-32281
- OSV GO-2026-4946
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.