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Fencer Vulns
medium 5.3

CVE-2026-61711 json

BuildKit: Custom frontend could bypass Seccomp/AppArmor

published 2026-08-19 2 mo ago modified 2026-09-10 1 mo ago also EUVD-2026-62838 , GHSA-7236-3392-c5c6 , GO-2026-6255

cvss
5.3
version 4.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 29%
public exploits
0
none known

Summary

BuildKit is a toolkit for converting source code to build artifacts in an efficient, expressive and repeatable manner. Prior to 0.31.1, a custom frontend could place an invalid SecurityMode value in a crafted build request, and executor/oci/spec_linux.go treated the unsupported value as a non-sandbox mode without requiring the security.insecure entitlement. This disabled Seccomp and AppArmor protections for the build container even though Linux capabilities remained restricted. This issue is fixed in version 0.31.1.

Patch / fix

  • go github.com/moby/buildkit 0.31.1
  • mobyproject buildkit 0.31.1
  • govulncheck-vulndb SLES for SAP applications 16.0, SLES 16.0 0.0.20260827T195228-160000.1.1

suse advisories SUSE-SU-2026:23625-1

  • govulncheck-vulndb openSUSE Leap 16.0 0.0.20260827T195228-160000.1.1

opensuse advisories openSUSE-SU-2026:21761-1

  • moby-engine Azure Linux 3.0 25.0.3-20

azure linux advisories AZL-97032

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-2026-61711 updated cvss 6.3

github.com/moby/buildkit: BuildKit: Security bypass allows disabling container protections

  • Red Hat Assisted Installer for Red Hat OpenShift Container Platform 2 rhai/assisted-installer-controller-rhel9, assisted/agent-preinstall-image-builder-rhel9 Red Hat Compliance Operator compliance/openshift-compliance-must-gather-rhel8 Red Hat Confidential Compute Attestation build-of-trustee/trustee-must-gather-rhel9, openshift-sandboxed-containers/osc-must-gather-rhel9, openshift-sandboxed-containers/osc-podvm-builder-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 Red Hat Logical Volume Manager Storage lvms4/lvms-must-gather-rhel8, lvms4/lvms-must-gather-rhel9
    +34 more products
    Red Hat Migration Toolkit for Applications 8 mta/mta-cli-rhel9, mta/mta-discovery-addon-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 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-service-8-rhel8, multicluster-engine/assisted-service-9-rhel9, multicluster-engine/assisted-installer-controller-rhel8, multicluster-engine/assisted-installer-controller-rhel9 Red Hat Node HealthCheck Operator workload-availability/node-healthcheck-must-gather-rhel8, 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/lightspeed-agentic-sandbox-rhel9 Red Hat OpenShift Serverless openshift-serverless-1/kn-client-kn-rhel9, openshift-serverless-clients 1.17.0-4.el9, openshift-serverless-1/serverless-must-gather-rhel9, openshift-serverless-1/kn-plugin-func-func-util-rhel9 Red Hat OpenShift Service Mesh 3 openshift-service-mesh/istio-cni-rhel9, openshift-service-mesh/istio-pilot-rhel9, openshift-service-mesh/istio-proxyv2-rhel9, openshift-service-mesh/istio-must-gather-rhel9 Red Hat OpenShift Source-to-Image (S2I) source-to-image/source-to-image-rhel8, source-to-image/source-to-image-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-must-gather-rhel9 Red Hat Ansible Automation Platform 2 ansible-automation-platform-24/ee-supported-rhel8, ansible-automation-platform-24/ee-supported-rhel9, ansible-automation-platform-25/ee-supported-rhel8, ansible-automation-platform-25/ee-supported-rhel9, ansible-automation-platform-26/ee-supported-rhel9, ansible-automation-platform-27/ee-supported-rhel9, +8 more Red Hat Build of Kueue kueue/kueue-must-gather-rhel9 Red Hat Build of Podman Desktop rh-podman-desktop.git 1.1.0 Red Hat Ceph Storage 9 rhceph/alloy-rhel10 Red Hat Certification Program for Red Hat Enterprise Linux 9 rhcertification/redhat-certification-baremetal, rhcertification/redhat-certification-system-ai-10 Red Hat Developer Hub 1 rhdh/rhdh-must-gather-rhel9 Red Hat Enterprise Linux 8 podman, buildah, podman-tests, buildah-tests, podman-docker, podman-remote, +4 more Red Hat Enterprise Linux 9 podman, buildah, podman-tests, ubi9/buildah, buildah-tests, podman-docker, +6 more Red Hat Enterprise Linux 10 ubi10/podman, ubi10/buildah, rhel10/rhel-bootc, podman 6.1.0-2.el10, buildah 1.43.1-4.el10_2, rhel10-eus/rhel-10.0-bootc, +2 more Red Hat Hardened Images podman 6.1.0-2.el10, trivy 0.73.0-0.1.hum1, buildah 1.43.1-4.el10_2 Red Hat OpenShift AI (RHOAI) rhoai/rhai-cli-rhel9, rhoai/odh-must-gather-rhel9, rhoai/odh-th06-cpu-torch291-py312-rhel9, rhoai/odh-th06-cuda130-torch291-py312-rhel9, rhoai/odh-ai-gateway-payload-processing-e2e-rhel9, rhoai/odh-pipeline-runtime-minimal-cpu-py312-rhel9, +17 more Red Hat OpenShift Container Platform 4 cri-o, podman, podman-tests, podman-docker, podman-remote, podman-gvproxy, +49 more Red Hat OpenShift Container Platform 5 openshift-clients, openshift-kni/commatrix, openshift5/ose-cli-rhel9, openshift5/cnf-tests-rhel9, openshift5/ose-tests-rhel9, openshift5/ose-tools-rhel9, +19 more Red Hat Openshift Data Foundation 4 odf4/mcg-core-rhel9, odf4/odf-must-gather-rhel9 Red Hat OpenShift Dev Spaces devspaces/udi-rhel9, devspaces/udi-base-rhel9, devspaces/udi-base-rhel10 Red Hat OpenShift GitOps 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/ocp-virt-validation-checkup-rhel9 Red Hat OpenStack Platform 18.0 rhoso-operators/openstack-must-gather-rhel9, rhoso-operators/prometheus-podman-exporter-rhel9 Red Hat Quay 3 quay/quay-builder-rhel8, quay/quay-builder-rhel9 Red Hat Trusted Artifact Signer rhtas/ec-rhel9
    affected: workaround, no fix available “Fix deferred”

1 more 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
partial
Assessed
2 mo ago

Exploit prediction

0.36% chance of exploitation in the next 30 days, higher than 29% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 4.0 5.3 CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
CNA 4.0 5.3 CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/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

Affected packages

ecosystem package affected fixed in
go github.com/moby/buildkit
<0.31.1
0.31.1

Affected products

  • moby buildkit

Classification

Weakness
  • CWE-20 Improper Input Validation

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.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.