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{"bugzilla": {"description": "github.com/tektoncd/pipeline: Tekton Pipelines: Unauthorized access and information disclosure via path validation bypass", "id": "2460269", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2460269"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.4", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N", "status": "draft"}, "cwe": "CWE-179", "details": ["A flaw was found in Tekton Pipelines. An attacker can bypass restrictions on where volumes can be mounted by using specially crafted paths that include directory traversal sequences (e.g., `..`). This vulnerability, stemming from an incomplete path validation check, could allow unauthorized access to internal system directories, potentially leading to information disclosure or limited modification of sensitive data."], "name": "CVE-2026-40923", "package_state": [{"cpe": "cpe:/a:redhat:openshift_builds:1", "fix_state": "Fix deferred", "package_name": "openshift-builds/openshift-builds-controller-rhel9", "product_name": "Builds for Red Hat OpenShift"}, {"cpe": "cpe:/a:redhat:openshift_builds:1", "fix_state": "Fix deferred", "package_name": "openshift-builds/openshift-builds-git-cloner-rhel9", "product_name": "Builds for Red Hat OpenShift"}, {"cpe": "cpe:/a:redhat:openshift_builds:1", "fix_state": "Fix deferred", "package_name": "openshift-builds/openshift-builds-image-bundler-rhel9", "product_name": "Builds for Red Hat OpenShift"}, {"cpe": "cpe:/a:redhat:openshift_builds:1", "fix_state": "Fix deferred", "package_name": "openshift-builds/openshift-builds-image-processing-rhel9", 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support scope", "package_name": "rhoai/odh-ml-pipelines-persistenceagent-v2-rhel8", "product_name": "Red Hat OpenShift AI (RHOAI)"}, {"cpe": "cpe:/a:redhat:openshift_ai", "fix_state": "Out of support scope", "package_name": "rhoai/odh-ml-pipelines-scheduledworkflow-v2-rhel8", "product_name": "Red Hat OpenShift AI (RHOAI)"}, {"cpe": "cpe:/a:redhat:container_native_virtualization:4", "fix_state": "Out of support scope", "package_name": "container-native-virtualization/kubevirt-ssp-operator-rhel9", "product_name": "Red Hat OpenShift Virtualization 4"}, {"cpe": "cpe:/a:redhat:container_native_virtualization:4", "fix_state": "Out of support scope", "package_name": "container-native-virtualization/kubevirt-tekton-tasks-create-datavolume-rhel9", "product_name": "Red Hat OpenShift Virtualization 4"}, {"cpe": "cpe:/a:redhat:container_native_virtualization:4", "fix_state": "Out of support scope", "package_name": "container-native-virtualization/kubevirt-tekton-tasks-disk-virt-customize-rhel9", "product_name": "Red Hat OpenShift Virtualization 4"}, {"cpe": "cpe:/a:redhat:container_native_virtualization:4", "fix_state": "Out of support scope", "package_name": "container-native-virtualization/kubevirt-template-validator-rhel9", "product_name": "Red Hat OpenShift Virtualization 4"}, {"cpe": "cpe:/a:redhat:trusted_artifact_signer:1", "fix_state": "Out of support scope", "package_name": "rhtas/ec-rhel9", "product_name": "Red Hat Trusted Artifact Signer"}], "public_date": "2026-04-21T20:50:53Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-40923\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-40923\nhttps://github.com/tektoncd/pipeline/releases/tag/v1.11.1\nhttps://github.com/tektoncd/pipeline/security/advisories/GHSA-rx35-6rhx-7858"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,1.11.1)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "pipeline", "source": "cna", "vendor": "tektoncd"}, "product": "pipeline", "vendor": "tektoncd"}], "analysis": {"en": {"generated_at": "2026-04-29T02:41:46.171601+00:00", "value": {"mitigation_remediation": ["Upgrade Tekton Pipelines to version\u202f1.11.1 or later.", "Verify that all existing Pipeline resources are using voluntary volume mounts within /tekton/ and adjust any that use traversal constructs to comply with the latest validation rules.", "Restrict the ability to create or modify Pipeline tasks and VolumeMount definitions to trusted users or namespaces to limit potential exploit exposure."], "summary": {"action": "Patch Now", "impact": "Confidentiality & Integrity"}, "threat_synthesis": {"affected_systems": "Tekton Pipelines (tektoncd:pipeline). All releases prior to\u202f1.11.1 are affected. The vulnerability is fixed starting with pipeline release\u202fv1.11.1.", "description_and_impact": "A validation bug in Tekton Pipelines before version\u202f1.11.1 allows an attacker to mount volumes under the protected /tekton/ internal directories by using path traversal components that bypass the mount\u2011path check. The check incorrectly relies on strings.HasPrefix without normalizing the path, so inputs such as /tekton/home/../results pass validation but resolve to /tekton/results at runtime. This can expose internal data or allow an attacker to place malicious files in locations that the pipeline assumes are safe, potentially compromising pipeline integrity and confidentiality of secret data.", "risk_and_exploitability": "The CVSS score of\u202f5.4 indicates moderate severity. The EPSS score of\u202f<1% indicates a very low but nonzero probability of exploitation, and the vulnerability is not listed in the CISA\u202fKEV catalog. Exploitation requires the ability to supply a task definition (or other resource) that contains a VolumeMount with a path designed to traverse beyond /tekton/. The attacker does not need network access to the host; the vulnerability is local to the Kubernetes cluster where Tekton Pipelines is running."}}}}, "created": "2026-04-22T03:45:06.830948+00:00", "updated": "2026-04-29T02:45:35.953792+00:00", "vendors": ["tektoncd", "tektoncd$PRODUCT$pipeline"]}