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vuln-cve/data/2026/40xxx/CVE-2026-40923.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-40923",
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"state": "PUBLISHED",
"assignerShortName": "GitHub_M",
"dateReserved": "2026-04-15T20:40:15.517Z",
"datePublished": "2026-04-21T20:50:53.742Z",
"dateUpdated": "2026-05-22T15:41:51.388Z"
},
"containers": {
"cna": {
"title": "Tekton Pipelines: VolumeMount path restriction bypass via missing filepath.Clean in /tekton/ check",
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-22",
"lang": "en",
"description": "CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')",
"type": "CWE"
}
]
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 5.4,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N",
"version": "3.1"
}
}
],
"references": [
{
"name": "https://github.com/tektoncd/pipeline/security/advisories/GHSA-rx35-6rhx-7858",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/tektoncd/pipeline/security/advisories/GHSA-rx35-6rhx-7858"
},
{
"name": "https://github.com/tektoncd/pipeline/releases/tag/v1.11.1",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/tektoncd/pipeline/releases/tag/v1.11.1"
}
],
"affected": [
{
"vendor": "tektoncd",
"product": "pipeline",
"versions": [
{
"version": ">= 1.0.0, < 1.0.2",
"status": "affected"
},
{
"version": ">= 1.2.0, < 1.3.4",
"status": "affected"
},
{
"version": ">= 1.4.0, < 1.6.2",
"status": "affected"
},
{
"version": ">= 1.7.0, < 1.9.3",
"status": "affected"
},
{
"version": ">= 1.10.0, < 1.11.1",
"status": "affected"
}
]
}
],
"providerMetadata": {
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M",
"dateUpdated": "2026-05-22T15:41:51.388Z"
},
"descriptions": [
{
"lang": "en",
"value": "Tekton Pipelines project provides k8s-style resources for declaring CI/CD-style pipelines. Starting in version 1.0.0 and prior to versions 1.0.2, 1.3.4, 1.6.2, 1.9.3, and 1.11.1, a validation bypass in the VolumeMount path restriction allows mounting volumes under restricted /tekton/ internal paths by using .. path traversal components. The restriction check uses strings.HasPrefix without filepath.Clean, so a path like /tekton/home/../results passes validation but resolves to /tekton/results at runtime. Versions 1.0.2, 1.3.4, 1.6.2, 1.9.3, and 1.11.1 fix the issue."
}
],
"source": {
"advisory": "GHSA-rx35-6rhx-7858",
"discovery": "UNKNOWN"
}
},
"adp": [
{
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-04-22T13:50:48.955785Z",
"id": "CVE-2026-40923",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-04-22T13:51:13.268Z"
}
}
]
}
}