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Fencer Vulns
low 3.7

CVE-2023-37264 json

Pipelines do not validate child UIDs

published 2023-07-07 3 y ago modified 2026-09-10 1 mo ago also GHSA-w2h3-vvvq-3m53 , GO-2023-1901 , EUVD-2023-2156

cvss
3.7
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 32%
public exploits
0
none known

Summary

Tekton Pipelines project provides k8s-style resources for declaring CI/CD-style pipelines. Starting in version 0.35.0, pipelines do not validate child UIDs, which means that a user that has access to create TaskRuns can create their own Tasks that the Pipelines controller will accept as the child Task. While the software stores and validates the PipelineRun's (api version, kind, name, uid) in the child Run's OwnerReference, it only store (api version, kind, name) in the ChildStatusReference. This means that if a client had access to create TaskRuns on a cluster, they could create a child TaskRun for a pipeline with the same name + owner reference, and the Pipeline controller picks it up as if it was the original TaskRun. This is problematic since it can let users modify the config of Pipelines at runtime, which violates SLSA L2 Service Generated / Non-falsifiable requirements. This issue can be used to trick the Pipeline controller into associating unrelated Runs to the Pipeline, feeding its data through the rest of the Pipeline. This requires access to create TaskRuns, so impact may vary depending on one Tekton setup. If users already have unrestricted access to create any Task/PipelineRun, this does not grant any additional capabilities. As of time of publication, there are no known patches for this issue.

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-2023-37264 updated cvss 4.3

tektoncd: pipelines do not validate child UIDs

  • Red Hat OpenShift Pipelines tektoncd Red Hat OpenShift Serverless knative-cli knative-cli, knative-serving knative-serving, knative-eventing knative-eventing Red Hat OpenShift Container Platform 4 odh-operator-container, odh-operator-base-container, openshift4/ose-gcp-pd-csi-driver-rhel9, openshift4/ose-gcp-filestore-csi-driver-rhel8, openshift-pipelines-triggers-webhook-rhel-8-container, openshift-pipelines-triggers-controller-rhel-8-container, +1 more Red Hat OpenShift Data Science (RHODS) rhods/odh-ml-pipelines-cache-rhel8, rhods/odh-ml-pipelines-persistenceagent-rhel8, rhods/odh-ml-pipelines-viewercontroller-rhel8, rhods/odh-ml-pipelines-scheduledworkflow-rhel8 Red Hat OpenShift GitOps openshift-gitops-1/kam-delivery-rhel8, openshift-gitops-managed-service-container, odh-ml-pipelines-persistenceagent-container, openshift-serverless-1-client-kn-rhel8-container Red Hat OpenShift Virtualization 4 container-native-virtualization/kubevirt-ssp-operator-rhel9, container-native-virtualization/kubevirt-tekton-tasks-operator, container-native-virtualization/kubevirt-template-validator-rhel9, container-native-virtualization/kubevirt-tekton-tasks-operator-rhel9
    not affected: vulnerable code not present

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
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.38% chance of exploitation in the next 30 days, higher than 32% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/tektoncd/pipeline/security/advisories/GHSA-w2h3-vvvq-3m53 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 3.7 CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N
NVD 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
GitHub 3.1 3.7 CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N

Affected packages

ecosystem package affected fixed in
go github.com/tektoncd/pipeline
>=0.35.0, <=0.52.0
>=0.35.0
 no fix listed

Affected products

  • tektoncd pipeline

Classification

Weakness
  • CWE-345 Insufficient Verification of Data Authenticity

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.