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Fencer Vulns
high 7.8

CVE-2026-46680 json

containerd user ID handling bypass allows runAsNonRoot evasion

published 2026-05-21 5 mo ago modified 2026-09-10 1 mo ago also GHSA-fqw6-gf59-qr4w , GO-2026-5378 , EUVD-2026-41103

cvss
7.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 5%
public exploits
0
none known

Summary

containerd is an open-source container runtime. In versions prior to 1.7.32, 2.0.9, 2.2.4 and 2.3.1, containers launched with a numeric User directive that cannot be parsed as a 32-bit integer are incorrectly treated as a username, leading to runAsNonRoot evasion. If a crafted image provides an /etc/passwd file mapping this large numeric string to root, the container ultimately runs as root (UID 0). This allows the Kubernetes runAsNonRoot restriction to be bypassed, causing unexpected behavior for environments that require containers to run as a non-root user. This issue has been fixed in versions 1.7.32, 2.0.9, 2.2.4 and 2.3.1.

Patch / fix

  • go github.com/containerd/containerd 1.7.32
  • go github.com/containerd/containerd/v2 2.0.9, 2.2.4, 2.3.1
  • linuxfoundation containerd 1.7.32, 2.0.9, 2.2.4, 2.3.1
  • containerd Debian 14 2.1.9+ds1-1

debian advisories DEBIAN-CVE-2026-46680

  • trivy hummingbird 1 0.72.0-0.1.hum1

red hat advisories RHSA-2026:35111

  • govulncheck-vulndb openSUSE Leap 16.0 0.0.20260723T184607-160000.1.1
  • containerd openSUSE Leap 16.0 1.7.33-160000.1.1
  • trivy openSUSE Leap 16.0 0.71.2-160000.1.1
  • containerd openSUSE Tumbleweed 1.7.33-1.1
  • trivy openSUSE Tumbleweed 0.71.1-2.1

opensuse advisories openSUSE-SU-2026:21483-1openSUSE-SU-2026:21213-1openSUSE-SU-2026:21072-1openSUSE-SU-2026:11107-1openSUSE-SU-2026:11048-1

  • containerd Alpine 3.24 2.3.1-r0

alpine advisories ALPINE-CVE-2026-46680

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • moby-containerd-cc Azure Linux 3.0 1.7.7-16

azure linux advisories AZL-91668

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

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-2026-46680 updated cvss 7.8

github.com/containerd/containerd: containerd: Privilege escalation via incorrect user ID handling

  • Red Hat Hardened Images trivy 0.72.0-0.1.hum1
    fixed: vendor fix RHSA-2026:35111
  • Red Hat Assisted Installer for Red Hat OpenShift Container Platform 2 rhai/assisted-installer-agent-rhel9, assisted/agent-preinstall-image-builder-rhel9 Red Hat Confidential Compute Attestation openshift-sandboxed-containers/osc-monitor-rhel9, openshift-sandboxed-containers/osc-must-gather-rhel9, openshift-sandboxed-containers/osc-podvm-payload-rhel9, openshift-sandboxed-containers/osc-cloud-api-adaptor-rhel9 Red Hat Deployment Validation Operator dvo/deployment-validation-rhel8-operator Red Hat Gatekeeper 3 gatekeeper/gatekeeper-rhel9 Red Hat Kernel Module Management Operator for Red Hat Openshift kmm/kernel-module-management-must-gather-rhel9 Red Hat Logging Subsystem for Red Hat OpenShift openshift-logging/cluster-logging-rhel9-operator
    +33 more products
    Red Hat Logical Volume Manager Storage lvms4/lvms-must-gather-rhel9 Red Hat Machine Deletion Remediation Operator workload-availability/machine-deletion-remediation-rhel9-operator, workload-availability/machine-deletion-remediation-operator-bundle Red Hat MCP Server for Red Hat OpenShift openshift-mcp-beta/openshift-mcp-server-rhel9 Red Hat Migration Toolkit for Containers rhmtc/openshift-migration-log-reader-rhel8, rhmtc/openshift-migration-must-gather-rhel8 Red Hat Migration Toolkit for Virtualization mtv-candidate/mtv-must-gather-rhel8, migration-toolkit-virtualization/mtv-must-gather-rhel8, migration-toolkit-virtualization/mtv-must-gather-rhel9 Red Hat Multicluster Engine for Kubernetes multicluster-engine/must-gather-rhel9, multicluster-engine/assisted-installer-rhel8, multicluster-engine/assisted-service-8-rhel8, multicluster-engine/assisted-service-9-rhel9, multicluster-engine/assisted-installer-agent-rhel8, multicluster-engine/assisted-installer-agent-rhel9, +2 more Red Hat Multicluster Global Hub multicluster-globalhub/multicluster-globalhub-agent-rhel9, multicluster-globalhub/multicluster-globalhub-grafana-rhel9, multicluster-globalhub/multicluster-globalhub-manager-rhel9, multicluster-globalhub/multicluster-globalhub-rhel9-operator Red Hat Node HealthCheck Operator workload-availability/node-healthcheck-must-gather-rhel9 Red Hat OpenShift API for Data Protection oadp/oadp-mustgather-rhel9 Red Hat OpenShift Developer Tools and Services ocp-tools-4/jenkins-rhel8, ocp-tools-4/jenkins-rhel9, ocp-tools-4/jenkins-agent-base-rhel8, ocp-tools-4/jenkins-agent-base-rhel9 Red Hat OpenShift Lightspeed openshift-lightspeed/openshift-mcp-server-rhel9, openshift-lightspeed/lightspeed-agentic-sandbox-rhel9 Red Hat OpenShift Pipelines openshift-pipelines/pipelines-controller-rhel8, openshift-pipelines/pipelines-entrypoint-rhel8, openshift-pipelines/pipelines-results-watcher-rhel8, openshift-pipelines/pipelines-sidecarlogresults-rhel8 Red Hat OpenShift Serverless openshift-serverless-1/serverless-must-gather-rhel9 Red Hat OpenShift Service Mesh 2 openshift-service-mesh/istio-rhel8-operator, openshift-service-mesh/istio-must-gather-rhel9 Red Hat OpenShift Service Mesh 3 openshift-service-mesh/istio-rhel9-operator, openshift-service-mesh/istio-must-gather-rhel9 Red Hat Pen Drive Powered by Red Hat Lightspeed pen-drive/pen-drive-scanner-rhel9 Red Hat Power monitoring for Red Hat OpenShift openshift-power-monitoring/power-monitoring-rhel9-operator Red Hat Advanced Cluster Management for Kubernetes 2 rhacm2/acm-grafana-rhel9, rhacm2/acm-must-gather-rhel9, rhacm2/multiclusterhub-rhel9, rhacm2/submariner-rhel9-operator, rhacm2/submariner-operator-bundle, rhacm2/multicloud-integrations-rhel9, +2 more Red Hat Advanced Cluster Security 4 advanced-cluster-security/rhacs-main-rhel8, advanced-cluster-security/rhacs-main-rhel9, advanced-cluster-security/rhacs-roxctl-rhel8, advanced-cluster-security/rhacs-roxctl-rhel9, advanced-cluster-security/rhacs-rhel8-operator, advanced-cluster-security/rhacs-rhel9-operator, +3 more Red Hat Ansible Automation Platform 2 ansible-automation-platform-24/aap-must-gather-rhel8, ansible-automation-platform-25/aap-must-gather-rhel8, ansible-automation-platform-26/aap-must-gather-rhel9, ansible-automation-platform-27/aap-must-gather-rhel9 Red Hat Build of Kueue kueue/kueue-must-gather-rhel9 Red Hat Ceph Storage 6 rhceph/rhceph-promtail-rhel9 Red Hat Ceph Storage 9 rhceph/alloy-rhel10 Red Hat OpenShift AI (RHOAI) rhoai/rhai-cli-rhel9, rhoai/odh-must-gather-rhel9, rhoai/odh-spark-operator-rhel9, rhoai/odh-th06-cpu-torch291-py312-rhel9, rhoai/odh-th06-cuda130-torch291-py312-rhel9, rhoai/odh-pipeline-runtime-minimal-cpu-py312-rhel9, +17 more Red Hat OpenShift Container Platform 4 openshift4/ose-cli, openshift4/ose-tests, openshift4/ose-console, openshift-kni/commatrix, openshift4/ose-deployer, openshift4/ose-cli-rhel9, +71 more Red Hat OpenShift Container Platform 5 openshift-kni/commatrix, openshift5/cnf-tests-rhel9, openshift5/ose-console-rhel9, openshift5/metallb-rhel9-operator, openshift5/oc-mirror-plugin-rhel9, openshift5/ose-olm-catalogd-rhel9, +15 more Red Hat Openshift Data Foundation 4 odf4/mcg-core-rhel9, odf4/odf-must-gather-rhel9, odf4/odf-cloudnative-pg-rhel9-operator Red Hat OpenShift Dev Spaces devspaces/traefik-rhel9 Red Hat OpenShift for Windows Containers openshift4-wincw/windows-machine-config-rhel9-operator Red Hat OpenShift GitOps openshift-gitops-1/argocd-rhel8, openshift-gitops-1/argocd-rhel9, openshift-gitops-1/must-gather-rhel8, openshift-gitops-1/must-gather-rhel9 Red Hat OpenShift Virtualization 4 container-native-virtualization/cnv-must-gather-rhel8, container-native-virtualization/cnv-must-gather-rhel9, container-native-virtualization/multus-dynamic-networks-rhel9 Red Hat OpenStack Platform 16.2 rhosp-rhel8/osp-director-operator-bundle Red Hat OpenStack Platform 17.1 rhosp-rhel9/osp-director-operator-bundle
    not affected: vulnerable code not present

3 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
no
Technical impact
total
Assessed
4 mo ago

Exploit prediction

0.16% chance of exploitation in the next 30 days, higher than 5% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 4.0 7.3 CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CNA 4.0 7.3 CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
NVD 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
GitHub 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
go github.com/containerd/containerd
>=1.7.27, <1.7.32
1.7.32
go github.com/containerd/containerd/v2
>=2.0.4, <2.0.9
>=2.1.0-beta.0, <2.2.4
>=2.3.0-beta.0, <2.3.1
2.0.9
2.2.4
2.3.1

Affected products

  • containerd containerd

Classification

Weakness
  • CWE-269 Improper Privilege Management
  • CWE-843 Access of Resource Using Incompatible Type

References

Sources

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.