CVE-2026-35469 - Vulnerability Details - OpenCVE

A flaw was found in the SPDY streaming code used by Kubelet, CRI-O, and kube-apiserver. An attacker with specific cluster roles, such as those allowing access to pod port forwarding, execution, or attachment, or node proxying, could exploit this vulnerability. This could lead to a Denial of Service (DoS) by causing the affected components to become unresponsive.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Vendors	Products
Kubernetes	Kubelet

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OpenCVE Enrichment is a feature of OpenCVE that uses AI to automatically link vendors and products to CVEs. Learn more on GitHub.

Vendors	Products
Kubernetes	Kubelet

References

Link	Providers
https://nvd.nist.gov/vuln/detail/CVE-2026-35469
https://www.cve.org/CVERecord?id=CVE-2026-35469

History

Thu, 16 Apr 2026 09:30:00 +0000

Type	Values Removed	Values Added
First Time appeared		Kubernetes Kubernetes kubelet
Vendors & Products		Kubernetes Kubernetes kubelet

Thu, 16 Apr 2026 00:15:00 +0000

Type	Values Removed	Values Added
Description		A flaw was found in the SPDY streaming code used by Kubelet, CRI-O, and kube-apiserver. An attacker with specific cluster roles, such as those allowing access to pod port forwarding, execution, or attachment, or node proxying, could exploit this vulnerability. This could lead to a Denial of Service (DoS) by causing the affected components to become unresponsive.
Title		Kubelet: CRI-O: kube-apiserver: Kubelet, CRI-O, kube-apiserver: Denial of Service via SPDY streaming code
Weaknesses		CWE-770
References		https://nvd.nist.gov/vuln/detail/CVE-2026-35469 https://www.cve.org/CVERecord?id=CVE-2026-35469
Metrics	threat_severity `None`	cvssV3_1 `{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}` threat_severity `Important`

MITRE

No data.

Vulnrichment

No data.

NVD

No data.

Redhat

Severity : Important

Publid Date: 2026-04-13T23:59:59Z

Links: CVE-2026-35469 - Bugzilla

OpenCVE Enrichment

Updated: 2026-04-16T09:12:54Z

{"bugzilla": {"description": "Kubelet: CRI-O: kube-apiserver: Kubelet, CRI-O, kube-apiserver: Denial of Service via SPDY streaming code", "id": "2457729", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2457729"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-770", "details": ["A flaw was found in the SPDY streaming code used by Kubelet, CRI-O, and kube-apiserver. An attacker with specific cluster roles, such as those allowing access to pod port forwarding, execution, or attachment, or node proxying, could exploit this vulnerability. This could lead to a Denial of Service (DoS) by causing the affected components to become unresponsive."], "mitigation": {"lang": "en:us", "value": "To mitigate this issue, review and restrict the assignment of Kubernetes cluster roles `pods/portforward (create)`, `pods/exec (create)`, `pods/attach (create)`, and `nodes/proxy (get/create)` to untrusted users or service accounts. Ensure that only authorized and necessary entities possess these permissions. Modifying RBAC policies can impact the functionality of applications and services that rely on these permissions; careful testing is recommended."}, "name": "CVE-2026-35469", "package_state": [{"cpe": "cpe:/a:redhat:cert_manager:1", "fix_state": "Affected", "package_name": "cert-manager/cert-manager-operator-bundle", "product_name": "cert-manager Operator for Red Hat OpenShift"}, {"cpe": "cpe:/a:redhat:cert_manager:1", "fix_state": "Affected", "package_name": "cert-manager/cert-manager-operator-rhel9", "product_name": "cert-manager Operator for Red Hat OpenShift"}, {"cpe": "cpe:/a:redhat:cert_manager:1", "fix_state": "Affected", "package_name": "cert-manager/jetstack-cert-manager-acmesolver-rhel9", "product_name": "cert-manager Operator for Red Hat OpenShift"}, {"cpe": "cpe:/a:redhat:cert_manager:1", "fix_state": "Affected", "package_name": "cert-manager/jetstack-cert-manager-rhel9", "product_name": "cert-manager Operator for Red Hat OpenShift"}, {"cpe": "cpe:/a:redhat:dynamic_accelerator_slicer:1", "fix_state": "Affected", "package_name": "dynamic-accelerator-slicer-tech-preview/instaslice-daemonset-rhel9", "product_name": "Dynamic Accelerator Slicer Operator for Red Hat OpenShift"}, {"cpe": "cpe:/a:redhat:dynamic_accelerator_slicer:1", "fix_state": "Affected", "package_name": "dynamic-accelerator-slicer-tech-preview/instaslice-operator-bundle", "product_name": "Dynamic Accelerator Slicer Operator for Red Hat OpenShift"}, {"cpe": "cpe:/a:redhat:dynamic_accelerator_slicer:1", "fix_state": "Affected", "package_name": "dynamic-accelerator-slicer-tech-preview/instaslice-rhel9-operator", "product_name": "Dynamic Accelerator Slicer Operator for Red Hat OpenShift"}, {"cpe": "cpe:/a:redhat:dynamic_accelerator_slicer:1", "fix_state": "Affected", "package_name": "dynamic-accelerator-slicer-tech-preview/instaslice-scheduler-rhel9", "product_name": "Dynamic Accelerator Slicer Operator for Red Hat OpenShift"}, {"cpe": "cpe:/a:redhat:dynamic_accelerator_slicer:1", "fix_state": "Affected", "package_name": "dynamic-accelerator-slicer-tech-preview/instaslice-webhook-rhel9", "product_name": "Dynamic Accelerator Slicer Operator for Red Hat OpenShift"}, {"cpe": "cpe:/a:redhat:external_secrets_operator:1", "fix_state": "Affected", "package_name": "external-secrets-operator/bitwarden-sdk-server-rhel9", "product_name": "External Secrets Operator for Red Hat OpenShift"}, {"cpe": "cpe:/a:redhat:external_secrets_operator:1", "fix_state": "Affected", "package_name": "external-secrets-operator/external-secrets-operator-bundle", "product_name": "External Secrets Operator for Red Hat OpenShift"}, {"cpe": "cpe:/a:redhat:external_secrets_operator:1", "fix_state": "Affected", "package_name": "external-secrets-operator/external-secrets-operator-rhel9", "product_name": "External Secrets Operator for Red Hat OpenShift"}, {"cpe": "cpe:/a:redhat:external_secrets_operator:1", "fix_state": "Affected", "package_name": 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"cpe:/a:redhat:openshift:4", "fix_state": "Affected", "package_name": "openshift4/ose-ovn-kubernetes-rhel9", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "package_name": "openshift4/ose-powervs-block-csi-driver-rhel9", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "package_name": "openshift4/ose-smb-csi-driver-rhel9", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "package_name": "openshift4/ose-sriov-network-config-daemon", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "package_name": "openshift4/ose-sriov-network-config-daemon-rhel9", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "package_name": "openshift4/ose-sriov-network-device-plugin-rhel9", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "package_name": "openshift4/ose-sriov-network-metrics-exporter-rhel9", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "package_name": "openshift4/ose-sriov-network-operator", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "package_name": "openshift4/ose-sriov-network-rhel9-operator", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "package_name": "openshift4/ose-sriov-network-webhook", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "package_name": "openshift4/ose-sriov-network-webhook-rhel9", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "package_name": "openshift4/ose-tests", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "package_name": "openshift4/ose-tests-rhel9", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "package_name": "openshift4/ose-vmware-vsphere-csi-driver-rhel8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "package_name": "openshift4/ose-vmware-vsphere-csi-driver-rhel9", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "package_name": "openshift4/ose-vsphere-csi-driver-rhel8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "package_name": "openshift4/ose-vsphere-csi-driver-rhel9", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "package_name": "openshift4/ose-vsphere-csi-driver-syncer-rhel8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "package_name": "openshift4/ose-vsphere-csi-driver-syncer-rhel9", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "package_name": "openshift4/sriov-network-metrics-exporter-rhel9", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "package_name": "openshift4-wincw/windows-machine-config-rhel8-operator", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "package_name": "openshift4-wincw/windows-machine-config-rhel9-operator", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "package_name": "openshift4/ztp-site-generate-rhel8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "package_name": "rhcos", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift_data_foundation:4", "fix_state": "Affected", "package_name": "odf4/cephcsi-rhel9", "product_name": "Red Hat Openshift Data Foundation 4"}, {"cpe": "cpe:/a:redhat:openshift_distributed_tracing:3", "fix_state": "Not affected", "package_name": "rhosdt/opentelemetry-collector-rhel9", "product_name": "Red Hat OpenShift distributed tracing 3"}, {"cpe": "cpe:/a:redhat:windows_machine_config", "fix_state": "Affected", "package_name": "openshift4-wincw/windows-machine-config-operator-bundle", "product_name": "Red Hat OpenShift for Windows Containers"}, {"cpe": "cpe:/a:redhat:windows_machine_config", "fix_state": "Affected", "package_name": "openshift4-wincw/windows-machine-config-rhel9-operator", "product_name": "Red Hat OpenShift for Windows Containers"}, {"cpe": "cpe:/a:redhat:openshift_gitops:1", "fix_state": "Affected", "package_name": "openshift-gitops-1/argo-rollouts-rhel8", "product_name": "Red Hat OpenShift GitOps"}, {"cpe": "cpe:/a:redhat:container_native_virtualization:4", "fix_state": "Affected", "package_name": "container-native-virtualization/libguestfs-tools-rhel9", "product_name": "Red Hat OpenShift Virtualization 4"}, {"cpe": "cpe:/a:redhat:container_native_virtualization:4", "fix_state": "Affected", "package_name": "container-native-virtualization/multus-dynamic-networks-rhel9", "product_name": "Red Hat OpenShift Virtualization 4"}, {"cpe": "cpe:/a:redhat:container_native_virtualization:4", "fix_state": "Affected", "package_name": "container-native-virtualization/passt-network-binding-plugin-cni-rhel9", "product_name": "Red Hat OpenShift Virtualization 4"}, {"cpe": "cpe:/a:redhat:container_native_virtualization:4", "fix_state": "Affected", "package_name": "container-native-virtualization/passt-network-binding-plugin-sidecar-rhel9", "product_name": "Red Hat OpenShift Virtualization 4"}, {"cpe": "cpe:/a:redhat:container_native_virtualization:4", "fix_state": "Affected", "package_name": "container-native-virtualization/pr-helper-rhel9", "product_name": "Red Hat OpenShift Virtualization 4"}, {"cpe": "cpe:/a:redhat:container_native_virtualization:4", "fix_state": "Affected", "package_name": "container-native-virtualization/sidecar-shim-rhel9", "product_name": "Red Hat OpenShift Virtualization 4"}, {"cpe": "cpe:/a:redhat:container_native_virtualization:4", "fix_state": "Affected", "package_name": "container-native-virtualization/virt-api-rhel9", "product_name": "Red Hat OpenShift Virtualization 4"}, {"cpe": "cpe:/a:redhat:container_native_virtualization:4", "fix_state": "Affected", "package_name": "container-native-virtualization/virt-artifacts-server-rhel9", "product_name": "Red Hat OpenShift Virtualization 4"}, {"cpe": "cpe:/a:redhat:container_native_virtualization:4", "fix_state": "Affected", "package_name": "container-native-virtualization/virt-controller-rhel9", "product_name": "Red Hat OpenShift Virtualization 4"}, {"cpe": "cpe:/a:redhat:container_native_virtualization:4", "fix_state": "Affected", "package_name": "container-native-virtualization/virt-exportproxy-rhel9", "product_name": "Red Hat OpenShift Virtualization 4"}, {"cpe": "cpe:/a:redhat:container_native_virtualization:4", "fix_state": "Affected", "package_name": "container-native-virtualization/virt-exportserver-rhel9", "product_name": "Red Hat OpenShift Virtualization 4"}, {"cpe": "cpe:/a:redhat:container_native_virtualization:4", "fix_state": "Affected", "package_name": "container-native-virtualization/virt-handler-rhel9", "product_name": "Red Hat OpenShift Virtualization 4"}, {"cpe": "cpe:/a:redhat:container_native_virtualization:4", "fix_state": "Affected", "package_name": "container-native-virtualization/virt-launcher-rhel9", "product_name": "Red Hat OpenShift Virtualization 4"}, {"cpe": "cpe:/a:redhat:container_native_virtualization:4", "fix_state": "Affected", "package_name": "container-native-virtualization/virt-operator-rhel9", "product_name": "Red Hat OpenShift Virtualization 4"}, {"cpe": "cpe:/a:redhat:container_native_virtualization:4", "fix_state": "Affected", "package_name": "container-native-virtualization/wasp-agent-rhel9", "product_name": "Red Hat OpenShift Virtualization 4"}, {"cpe": "cpe:/a:redhat:zero_trust_workload_identity_manager:1", "fix_state": "Affected", "package_name": "zero-trust-workload-identity-manager/zero-trust-workload-identity-manager-rhel9", "product_name": "Zero Trust Workload Identity Manager"}], "public_date": "2026-04-13T23:59:59Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-35469\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-35469"], "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": null}], "enrichment": {"confidence": 80.0, "confidence_source": "inferred", "scores": [{"score": 80.0, "source": "inferred"}, {"score": 85.0, "source": "matching"}]}, "product": "kubelet", "vendor": "kubernetes"}], "analysis": {"en": {"generated_at": "2026-04-16T08:48:50.422750+00:00", "value": {"mitigation_remediation": ["Upgrade Kubelet, CRI\u2011O, and kube\u2011apiserver to the latest patched releases that fix SPDY streaming", "Restrict RBAC permissions for pod port\u2011forward, exec, attach, and proxy to trusted users only", "Apply resource limits and pod quotas to limit the number of concurrent SPDY streams and prevent resource exhaustion"], "summary": {"action": "Immediate Patch", "impact": "Denial of Service"}, "threat_synthesis": {"affected_systems": "The affected components are Kubernetes Kubelet, the CRI\u2011O container runtime, and the kube\u2011apiserver. The specific product versions that contain the defect are not disclosed in the data provided. Any installation of these components that has not yet been patched is potentially vulnerable and should be reviewed for the presence of the fix.", "description_and_impact": "A flaw in the SPDY streaming code used by Kubelet, CRI\u2011O and kube\u2011apiserver can cause the affected components to become unresponsive. The vulnerability is a resource exhaustion issue (CWE\u2011770) that can interrupt normal cluster operations. When successfully exploited, it leads to a denial of service of the components involved, depriving administrators and applications that rely on pod port forwarding, execution, attachment or node proxying from operational availability.", "risk_and_exploitability": "The CVSS score of 6.5 indicates moderate severity, and no EPSS score is available, so the likelihood of an exploitation event is uncertain but cannot be excluded. The vulnerability is not marked in the CISA KEV catalog. Attackers who can assume cluster roles that permit pod port\u2011forwarding, execution, attachment, or node proxying are able to trigger the DoS path, typically by opening multiple SPDY streams that overwhelm component resources. The implications are a loss of availability for the affected services, which can cascade to impact dependent workloads."}}}}, "created": "2026-04-16T09:00:05.304120+00:00", "updated": "2026-04-16T09:12:54.863240+00:00", "vendors": ["kubernetes", "kubernetes$PRODUCT$kubelet"]}