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TI-2026-34311 Aliases CVE-2026-46680GHSA-fqw6-gf59-qr4w

containerd user ID handling bypass allows runAsNonRoot evasion

Priority LOW 33CWE-269Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
Passive
Attack complexity
Low
Attack requirements
Present
Impact type
Privilege escalation, Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-269, CWE-843 and the CVSS impact.

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00163 5th percentileScored 2026-11-07
Fix Fixed containerd (containerd): 1.7.32, 2.0.9, 2.2.4 +1github.com/containerd/containerd (Go): 1.7.32+1 more productRed Hat: 1 advisory

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
backstagecontainerdbefore 1.7.32; 2.0.4 to before 2.0.9; 2.0.10 to before 2.2.4; 2.2.5 to before 2.3.11.7.32, 2.0.9, 2.2.4, 2.3.1Patch availableCNA
—github.com/containerd/containerd (Go)1.7.27 to before 1.7.321.7.32Patch availableGHSA-fqw6-gf59-qr4w
—github.com/containerd/containerd/v2 (Go)2.0.4 to before 2.0.92.0.9Patch availableGHSA-fqw6-gf59-qr4w
—github.com/containerd/containerd/v2 (Go)2.1.0-beta.0 to before 2.2.42.2.4Patch availableGHSA-fqw6-gf59-qr4w
—github.com/containerd/containerd/v2 (Go)2.3.0-beta.0 to before 2.3.12.3.1Patch availableGHSA-fqw6-gf59-qr4w
  • containerd Vendorbackstage Affected before 1.7.32; 2.0.4 to before 2.0.9; 2.0.10 to before 2.2.4; 2.2.5 to before 2.3.1 Fixed in 1.7.32, 2.0.9, 2.2.4, 2.3.1 Patch available CNA
  • github.com/containerd/containerd (Go) Vendor— Affected 1.7.27 to before 1.7.32 Fixed in 1.7.32 Patch available GHSA-fqw6-gf59-qr4w
  • github.com/containerd/containerd/v2 (Go) Vendor— Affected 2.0.4 to before 2.0.9 Fixed in 2.0.9 Patch available GHSA-fqw6-gf59-qr4w
  • github.com/containerd/containerd/v2 (Go) Vendor— Affected 2.1.0-beta.0 to before 2.2.4 Fixed in 2.2.4 Patch available GHSA-fqw6-gf59-qr4w
  • github.com/containerd/containerd/v2 (Go) Vendor— Affected 2.3.0-beta.0 to before 2.3.1 Fixed in 2.3.1 Patch available GHSA-fqw6-gf59-qr4w

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:linuxfoundation:containerd:*:*:*:*:*:*:*:*1.7.27 to before 1.7.32; 2.0.4 to before 2.0.9; 2.1.0 to before 2.2.4; 2.3.0 to before 2.3.1Vulnerablebackstage
  • cpe:2.3:a:linuxfoundation:containerd:*:*:*:*:*:*:*:* Versions 1.7.27 to before 1.7.32; 2.0.4 to before 2.0.9; 2.1.0 to before 2.2.4; 2.3.0 to before 2.3.1 Vulnerable ·backstage

Remediation

  • Fix · CNA containerd (containerd) Fixed in 1.7.32, 2.0.9, 2.2.4, 2.3.1
  • Fix · GHSA-fqw6-gf59-qr4w github.com/containerd/containerd (Go) Fixed in 1.7.32 Advisory →
  • Fix · GHSA-fqw6-gf59-qr4w github.com/containerd/containerd/v2 (Go) Fixed in 2.0.9 Advisory →
  • Fix · GHSA-fqw6-gf59-qr4w github.com/containerd/containerd/v2 (Go) Fixed in 2.2.4 Advisory →
  • Fix · GHSA-fqw6-gf59-qr4w github.com/containerd/containerd/v2 (Go) Fixed in 2.3.1 Advisory →

Red Hat 1 advisory

  • RHSA-2026:35111 Released 2026-07-02 · Red Hat rating Important
    Red Hat Hardened Images RPMs Security Update
    • Red Hat Hardened Images trivy-0.72.0-0.1.hum1@aarch64, trivy-0.72.0-0.1.hum1@src, trivy-0.72.0-0.1.hum1@x86_64

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Hardened ImagesFixed RHSA-2026:35111
Not affected: 42 products
  • Assisted Installer for Red Hat OpenShift Container Platform 2
  • Confidential Compute Attestation
  • Deployment Validation Operator
  • Gatekeeper 3
  • Kernel Module Management Operator for Red Hat Openshift
  • Logging Subsystem for Red Hat OpenShift
  • Logical Volume Manager Storage
  • MCP Server for Red Hat OpenShift
  • Machine Deletion Remediation Operator
  • Migration Toolkit for Containers
  • Migration Toolkit for Virtualization
  • Multicluster Engine for Kubernetes
  • Multicluster Global Hub
  • Node HealthCheck Operator
  • OpenShift API for Data Protection
  • OpenShift Developer Tools and Services
  • OpenShift Lightspeed
  • OpenShift Pipelines
  • OpenShift Serverless
  • OpenShift Service Mesh 2
  • OpenShift Service Mesh 3
  • Pen Drive Powered by Red Hat Lightspeed
  • Power monitoring for Red Hat OpenShift
  • Red Hat Advanced Cluster Management for Kubernetes 2
  • Red Hat Advanced Cluster Security 4
  • Red Hat Ansible Automation Platform 2
  • Red Hat Build of Kueue
  • Red Hat Ceph Storage 6
  • Red Hat Ceph Storage 9
  • Red Hat OpenShift AI (RHOAI)
  • Red Hat OpenShift Container Platform 4
  • Red Hat OpenShift Container Platform 5
  • Red Hat OpenShift Dev Spaces
  • Red Hat OpenShift GitOps
  • Red Hat OpenShift Virtualization 4
  • Red Hat OpenShift for Windows Containers
  • Red Hat OpenStack Platform 16.2
  • Red Hat OpenStack Platform 17.1
  • Red Hat OpenStack Platform 18.0
  • Red Hat Openshift Data Foundation 4
  • Red Hat Trusted Artifact Signer
  • Red Hat Trusted Profile Analyzer

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-46680
  2. 2026-10-03 Alias added: GHSA-fqw6-gf59-qr4w
  3. 2026-11-05 Affected versions changed · Red Hat

References

Advisory 2

Other 1

  • TI-2021-19622 Improper Preservation of Permissions in containerd CVSS 3.1CRITICAL 9.1
  • TI-2023-10635 containerd supplementary groups are not set up properly CVSS 3.1HIGH 7.8
  • TI-2022-07700 Insecure handling of image volumes in containerd CRI plugin CVSS 3.1HIGH 7.5
  • TI-2026-38567 Improper input validation in backstage containerd CVSS 4.0CRITICAL 9.4
  • TI-2026-38569 containerd CRI checkpoint restore CDI annotation smuggling CVSS 4.0HIGH 8.4
  • TI-2025-29820 Containerd vulnerable to host filesystem access during image unpack CVSS 4.0HIGH 7.6
See all 21 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences