CVE-2026-4427

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{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-4427", "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "state": "REJECTED", "assignerShortName": "redhat", "dateReserved": "2026-03-19T12:54:24.750Z", "datePublished": "2026-03-19T14:24:02.864Z", "dateUpdated": "2026-03-30T07:59:41.848Z", "dateRejected": "2026-03-30T07:59:41.848Z"}, "containers": {"cna": {"rejectedReasons": [{"lang": "en", "value": "Duplicate of CVE-2026-32286"}], "providerMetadata": {"orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "shortName": "redhat", "dateUpdated": "2026-03-30T07:59:41.848Z"}}}}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "Rejected reason: Duplicate of CVE-2026-32286"}], "id": "CVE-2026-4427", "lastModified": "2026-03-30T08:16:18.573", "metrics": {}, "published": "2026-03-19T15:16:28.710", "references": [], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Rejected"}

{"bugzilla": {"description": "github.com/jackc/pgproto3: pgproto3: Denial of Service via negative field length in DataRow message", "id": "2448626", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2448626"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-129", "details": ["A flaw was found in pgproto3. A malicious or compromised PostgreSQL server can exploit this by sending a DataRow message with a negative field length. This input validation vulnerability can lead to a denial of service (DoS) due to a slice bounds out of range panic."], "name": "CVE-2026-4427", "package_state": [{"cpe": "cpe:/a:redhat:assisted_installer:2", "fix_state": "Affected", "package_name": "rhai/assisted-installer-controller-rhel9", "product_name": "Assisted Installer for Red Hat OpenShift Container Platform 2"}, {"cpe": "cpe:/a:redhat:assisted_installer:2", "fix_state": "Affected", "package_name": "rhai/assisted-installer-rhel9", "product_name": "Assisted Installer for Red Hat OpenShift Container Platform 2"}, {"cpe": "cpe:/a:redhat:multicluster_engine", "fix_state": "Affected", "package_name": "multicluster-engine/assisted-installer-agent-rhel8", "product_name": "Multicluster Engine for Kubernetes"}, {"cpe": "cpe:/a:redhat:multicluster_engine", "fix_state": "Affected", "package_name": "multicluster-engine/assisted-installer-agent-rhel9", "product_name": "Multicluster Engine for Kubernetes"}, {"cpe": "cpe:/a:redhat:multicluster_engine", "fix_state": "Affected", "package_name": "multicluster-engine/assisted-installer-controller-rhel8", "product_name": "Multicluster Engine for Kubernetes"}, {"cpe": "cpe:/a:redhat:multicluster_engine", "fix_state": "Affected", "package_name": "multicluster-engine/assisted-installer-controller-rhel9", "product_name": "Multicluster Engine for Kubernetes"}, {"cpe": "cpe:/a:redhat:multicluster_engine", "fix_state": "Affected", "package_name": "multicluster-engine/assisted-installer-rhel8", "product_name": "Multicluster Engine for Kubernetes"}, {"cpe": "cpe:/a:redhat:multicluster_engine", "fix_state": "Affected", "package_name": "multicluster-engine/assisted-installer-rhel9", "product_name": "Multicluster Engine for Kubernetes"}, {"cpe": "cpe:/a:redhat:multicluster_engine", "fix_state": "Affected", "package_name": "multicluster-engine/assisted-service-8-rhel8", "product_name": "Multicluster Engine for Kubernetes"}, {"cpe": "cpe:/a:redhat:multicluster_engine", "fix_state": "Affected", "package_name": "multicluster-engine/assisted-service-9-rhel9", "product_name": "Multicluster Engine for Kubernetes"}, {"cpe": "cpe:/a:redhat:multicluster_engine", "fix_state": "Affected", "package_name": "multicluster-engine/cluster-api-provider-aws-rhel9", "product_name": "Multicluster Engine for Kubernetes"}, {"cpe": "cpe:/a:redhat:multicluster_globalhub", "fix_state": "Affected", "package_name": "multicluster-globalhub/multicluster-globalhub-agent-rhel9", "product_name": "Multicluster Global Hub"}, {"cpe": "cpe:/a:redhat:multicluster_globalhub", "fix_state": "Affected", "package_name": "multicluster-globalhub/multicluster-globalhub-grafana-rhel9", "product_name": "Multicluster Global Hub"}, {"cpe": "cpe:/a:redhat:multicluster_globalhub", "fix_state": "Affected", "package_name": "multicluster-globalhub/multicluster-globalhub-manager-rhel9", "product_name": "Multicluster Global Hub"}, {"cpe": "cpe:/a:redhat:multicluster_globalhub", "fix_state": "Affected", "package_name": "multicluster-globalhub/multicluster-globalhub-operator-bundle", "product_name": "Multicluster Global Hub"}, {"cpe": "cpe:/a:redhat:multicluster_globalhub", "fix_state": "Affected", "package_name": "multicluster-globalhub/multicluster-globalhub-rhel9-operator", "product_name": "Multicluster Global Hub"}, {"cpe": "cpe:/a:redhat:acm:2", "fix_state": "Affected", "package_name": "rhacm2/acm-search-indexer-rhel9", "product_name": "Red Hat Advanced Cluster Management for Kubernetes 2"}, {"cpe": "cpe:/a:redhat:acm:2", "fix_state": "Affected", "package_name": "rhacm2/acm-search-v2-api-rhel9", "product_name": "Red Hat Advanced Cluster Management for Kubernetes 2"}, {"cpe": "cpe:/a:redhat:advanced_cluster_security:4", "fix_state": "Affected", "package_name": "advanced-cluster-security/rhacs-main-rhel8", "product_name": "Red Hat Advanced Cluster Security 4"}, {"cpe": "cpe:/a:redhat:advanced_cluster_security:4", "fix_state": "Affected", "package_name": "advanced-cluster-security/rhacs-rhel8-operator", "product_name": "Red Hat Advanced Cluster Security 4"}, {"cpe": "cpe:/a:redhat:advanced_cluster_security:4", "fix_state": "Affected", "package_name": "advanced-cluster-security/rhacs-roxctl-rhel8", "product_name": "Red Hat Advanced Cluster Security 4"}, {"cpe": "cpe:/a:redhat:advanced_cluster_security:4", "fix_state": "Affected", "package_name": "advanced-cluster-security/rhacs-scanner-v4-rhel8", "product_name": "Red Hat Advanced Cluster Security 4"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "osbuild-composer", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "osbuild-composer", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "osbuild-composer", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift_ai", "fix_state": "Affected", "package_name": "rhoai/odh-data-science-pipelines-argo-argoexec-rhel9", "product_name": "Red Hat OpenShift AI (RHOAI)"}, {"cpe": "cpe:/a:redhat:openshift_ai", "fix_state": "Affected", "package_name": "rhoai/odh-data-science-pipelines-argo-workflowcontroller-rhel9", "product_name": "Red Hat OpenShift AI (RHOAI)"}, {"cpe": "cpe:/a:redhat:openshift_ai", "fix_state": "Affected", "package_name": "rhoai/odh-model-registry-rhel9", "product_name": "Red Hat OpenShift AI (RHOAI)"}, {"cpe": "cpe:/a:redhat:openshift_cluster_manager_cli:1", "fix_state": "Affected", "package_name": "ocm-cli-clients/ocm-cli-rhel9", "product_name": "Red Hat OpenShift Cluster Manager CLI"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "package_name": "openshift4/oc-mirror-plugin-rhel9", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "package_name": "openshift4/ose-agent-based-installer", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "package_name": "openshift4/ose-agent-installer-api-server-rhel8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "package_name": "openshift4/ose-agent-installer-api-server-rhel9", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "package_name": "openshift4/ose-agent-installer-csr-approver-rhel8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "package_name": "openshift4/ose-agent-installer-csr-approver-rhel9", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "package_name": "openshift4/ose-agent-installer-node-agent-rhel8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "package_name": "openshift4/ose-agent-installer-node-agent-rhel9", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "package_name": "openshift4/ose-agent-installer-orchestrator-rhel8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "package_name": "openshift4/ose-agent-installer-orchestrator-rhel9", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "package_name": "openshift4/ose-aws-cluster-api-controllers-rhel9", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift_service_on_aws:1", "fix_state": "Affected", "package_name": "rosa", "product_name": "Red Hat OpenShift on AWS"}, {"cpe": "cpe:/a:redhat:quay:3", "fix_state": "Affected", "package_name": "quay/clair-rhel8", "product_name": "Red Hat Quay 3"}, {"cpe": "cpe:/a:redhat:quay:3", "fix_state": "Affected", "package_name": "quay/clair-rhel9", "product_name": "Red Hat Quay 3"}, {"cpe": "cpe:/a:redhat:quay:3", "fix_state": "Affected", "package_name": "quay/quay-operator-rhel8", "product_name": "Red Hat Quay 3"}, {"cpe": "cpe:/a:redhat:quay:3", "fix_state": "Affected", "package_name": "quay/quay-operator-rhel9", "product_name": "Red Hat Quay 3"}, {"cpe": "cpe:/a:redhat:quay:3", "fix_state": "Affected", "package_name": "quay/quay-rhel8", "product_name": "Red Hat Quay 3"}, {"cpe": "cpe:/a:redhat:quay:3", "fix_state": "Affected", "package_name": "quay/quay-rhel9", "product_name": "Red Hat Quay 3"}, {"cpe": "cpe:/a:redhat:trusted_artifact_signer:1", "fix_state": "Affected", "package_name": "rhtas/createtree-rhel9", "product_name": "Red Hat Trusted Artifact Signer"}, {"cpe": "cpe:/a:redhat:trusted_artifact_signer:1", "fix_state": "Affected", "package_name": "rhtas/trillian-database-rhel9", "product_name": "Red Hat Trusted Artifact Signer"}, {"cpe": "cpe:/a:redhat:trusted_artifact_signer:1", "fix_state": "Affected", "package_name": "rhtas/trillian-logserver-rhel9", "product_name": "Red Hat Trusted Artifact Signer"}, {"cpe": "cpe:/a:redhat:trusted_artifact_signer:1", "fix_state": "Affected", "package_name": "rhtas/trillian-logsigner-rhel9", "product_name": "Red Hat Trusted Artifact Signer"}, {"cpe": "cpe:/a:redhat:trusted_artifact_signer:1", "fix_state": "Affected", "package_name": "rhtas/updatetree-rhel9", "product_name": "Red Hat Trusted Artifact Signer"}], "public_date": "2026-03-18T13:00:31Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-4427\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-4427\nhttps://github.com/golang/vulndb/issues/4518\nhttps://github.com/jackc/pgproto3\nhttps://github.com/jackc/pgx/issues/2507\nhttps://securityinfinity.com/research/memory-safety-vulnerabilities-in-go-postgresql-wire-protocol-parsers-pgproto3-pgx"], "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": null}], "enrichment": {"confidence": 90.0, "confidence_source": "matching", "scores": [{"score": 90.0, "source": "matching"}]}, "original": {"product": "Red Hat Advanced Cluster Management for Kubernetes 2", "source": "cna", "vendor": "Red Hat"}, "product": "advanced_cluster_management_for_kubernetes", "vendor": "redhat"}, {"configurations": [{"platform": null, "status": "affected", "versions": null}], "enrichment": {"confidence": 85.0, "confidence_source": "matching", "scores": [{"score": 85.0, "source": "matching"}]}, "original": {"product": "Red Hat Advanced Cluster Security 4", "source": "cna", "vendor": "Red Hat"}, "product": "advanced_cluster_security", "vendor": "redhat"}, {"configurations": [{"platform": null, "status": "affected", "versions": null}], "enrichment": {"confidence": 100.0, "confidence_source": "manual", "scores": [{"score": 100.0, "source": "manual"}]}, "original": {"product": "Red Hat Enterprise Linux 10", "source": "cna", "vendor": "Red Hat"}, "product": "enterprise_linux", "vendor": "redhat"}, {"configurations": [{"platform": null, "status": "affected", "versions": null}], "enrichment": {"confidence": 100.0, "confidence_source": "manual", "scores": [{"score": 100.0, "source": "manual"}]}, "original": {"product": "Multicluster Engine for Kubernetes", "source": "cna", "vendor": "Red Hat"}, "product": "multicluster_engine", "vendor": "redhat"}, {"configurations": [{"platform": null, "status": "affected", "versions": null}], "enrichment": {"confidence": 97.0, "confidence_source": "matching", "scores": [{"score": 97.0, "source": "matching"}]}, "original": {"product": "Multicluster Global Hub", "source": "cna", "vendor": "Red Hat"}, "product": "multicluster_globalhub", "vendor": "redhat"}, {"configurations": [{"platform": null, "status": "affected", "versions": null}], "enrichment": {"confidence": 100.0, "confidence_source": "manual", "scores": [{"score": 100.0, "source": "manual"}]}, "original": {"product": "Red Hat OpenShift AI (RHOAI)", "source": "cna", "vendor": "Red Hat"}, "product": "openshift_ai", "vendor": "redhat"}, {"configurations": [{"platform": null, "status": "affected", "versions": null}], "enrichment": {"confidence": 100.0, "confidence_source": "manual", "scores": [{"score": 100.0, "source": "manual"}]}, "original": {"product": "Red Hat OpenShift Cluster Manager CLI", "source": "cna", "vendor": "Red Hat"}, "product": "openshift_cluster_manager_cli", "vendor": "redhat"}, {"configurations": [{"platform": null, "status": "affected", "versions": null}], "enrichment": {"confidence": 100.0, "confidence_source": "manual", "scores": [{"score": 100.0, "source": "manual"}]}, "original": {"product": "Assisted Installer for Red Hat OpenShift Container Platform 2", "source": "cna", "vendor": "Red Hat"}, "product": "openshift_container_platform", "vendor": "redhat"}, {"configurations": [{"platform": null, "status": "affected", "versions": null}], "enrichment": {"confidence": 86.0, "confidence_source": "matching", "scores": [{"score": 86.0, "source": "matching"}]}, "original": {"product": "Red Hat OpenShift Container Platform 4", "source": "cna", "vendor": "Red Hat"}, "product": "openshift_container_platform", "vendor": "redhat"}, {"configurations": [{"platform": null, "status": "affected", "versions": null}], "enrichment": {"confidence": 100.0, "confidence_source": "manual", "scores": [{"score": 100.0, "source": "manual"}]}, "original": {"product": "Red Hat OpenShift on AWS", "source": "cna", "vendor": "Red Hat"}, "product": "openshift_on_aws", "vendor": "redhat"}, {"configurations": [{"platform": null, "status": "affected", "versions": null}], "enrichment": {"confidence": 100.0, "confidence_source": "manual", "scores": [{"score": 100.0, "source": "manual"}]}, "original": {"product": "Red Hat Quay 3", "source": "cna", "vendor": "Red Hat"}, "product": "quay_3", "vendor": "redhat"}, {"configurations": [{"platform": null, "status": "affected", "versions": null}], "enrichment": {"confidence": 87.0, "confidence_source": "matching", "scores": [{"score": 87.0, "source": "matching"}]}, "original": {"product": "Red Hat Trusted Artifact Signer", "source": "cna", "vendor": "Red Hat"}, "product": "trusted_artifact_signer", "vendor": "redhat"}], "analysis": {"en": {"generated_at": "2026-03-19T15:27:55.227786+00:00", "value": {"mitigation_remediation": ["Check the vendor\u2019s security portal or product release notes for an updated version of the pgproto3 library or related Red\u00a0Hat component.", "If an update is available, install or upgrade the affected product to the patched version.", "While awaiting a patch, restrict network connectivity so that only trusted PostgreSQL servers can communicate with the affected clients.", "Consider implementing firewall rules or ingress policies that block or inspect DataRow messages from untrusted sources.", "Monitor the system for unexpected panics or restarts that may indicate exploitation attempts."], "summary": {"action": "Update", "impact": "Denial of Service"}, "threat_synthesis": {"affected_systems": "The flaw affects a wide range of Red\u00a0Hat products that incorporate the pgproto3 library: Assisted Installer for Red\u00a0Hat OpenShift Container Platform\u00a02, Multicluster Engine for Kubernetes, Multicluster Global Hub, Red\u00a0Hat Advanced Cluster Management for Kubernetes\u00a02, Red\u00a0Hat Advanced Cluster Security\u00a04, Red\u00a0Hat Enterprise Linux\u00a08/9/10, Red\u00a0Hat OpenShift AI (RHOAI), Red\u00a0Hat OpenShift Cluster Manager CLI, Red\u00a0Hat OpenShift Container Platform\u00a04, Red\u00a0Hat OpenShift on AWS, Red\u00a0Hat Quay\u00a03, and Red\u00a0Hat Trusted Artifact Signer. Specific affected versions are not listed in the CNA data, so the entire product families are considered potentially impacted.", "description_and_impact": "The vulnerability resides in the pgproto3 Go library, which parses PostgreSQL wire protocol messages. A malicious or compromised PostgreSQL server can send a DataRow message that specifies a negative field length. This improper input validation causes a slice bounds out of range panic in the client, resulting in a denial\u2011of\u2011service (DoS) condition. The weakness is identified as CWE\u2011129, an input validation failure that triggers uncontrolled memory or control flow errors.", "risk_and_exploitability": "The CVSS score is 7.5 (High). EPSS is not available, and the vulnerability is not listed in the CISA KEV catalog. The exploit requires a compromised or malicious PostgreSQL server that can communicate with the vulnerable client. The attack vector is therefore a remote network attacker or a malicious server; no local privileges are required. Given the severity and the potential for network\u2011based exploitation, the overall risk level is high, and remediation is advised even if a patch is not currently released."}}}}, "created": "2026-03-20T08:56:48.092702+00:00", "updated": "2026-03-20T14:14:54.214879+00:00", "vendors": ["redhat", "redhat$PRODUCT$advanced_cluster_management_for_kubernetes", "redhat$PRODUCT$advanced_cluster_security", "redhat$PRODUCT$enterprise_linux", "redhat$PRODUCT$multicluster_engine", "redhat$PRODUCT$multicluster_globalhub", "redhat$PRODUCT$openshift_ai", "redhat$PRODUCT$openshift_cluster_manager_cli", "redhat$PRODUCT$openshift_container_platform", "redhat$PRODUCT$openshift_on_aws", "redhat$PRODUCT$quay_3", "redhat$PRODUCT$trusted_artifact_signer"]}