CVE-2026-40923

{
  "id": "CVE-2026-40923",
  "sourceIdentifier": "[email protected]",
  "published": "2026-04-21T21:16:45.543",
  "lastModified": "2026-10-26T22:10:00.163",
  "vulnStatus": "Modified",
  "cveTags": [],
  "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."
    },
    {
      "lang": "es",
      "value": "El proyecto Tekton Pipelines proporciona recursos estilo k8s para declarar pipelines estilo CI/CD. A partir de la versión 1.0.0 y antes de las versiones 1.0.2, 1.3.4, 1.6.2, 1.9.3 y 1.11.1, una omisión de validación en la restricción de ruta de VolumeMount permite montar volúmenes bajo rutas internas restringidas /tekton/ utilizando componentes de salto de ruta ... La comprobación de la restricción utiliza strings.HasPrefix sin filepath.Clean, por lo que una ruta como /tekton/home/.. / results pasa la validación pero se resuelve a /tekton/results en tiempo de ejecución. Las versiones 1.0.2, 1.3.4, 1.6.2, 1.9.3 y 1.11.1 corrigen el problema."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "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"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N",
          "baseScore": 5.4,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 2.5
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-04-22T13:50:48.955785Z",
          "id": "CVE-2026-40923",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-22"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:linuxfoundation:tekton_pipelines:*:*:*:*:*:go:*:*",
              "versionEndExcluding": "1.11.1",
              "matchCriteriaId": "CC2C0633-AA1A-4CB5-8FA4-CD63381DCE11"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/tektoncd/pipeline/releases/tag/v1.11.1",
      "source": "[email protected]",
      "tags": [
        "Release Notes"
      ]
    },
    {
      "url": "https://github.com/tektoncd/pipeline/security/advisories/GHSA-rx35-6rhx-7858",
      "source": "[email protected]",
      "tags": [
        "Vendor Advisory"
      ]
    }
  ]
}