November 13, 2026 Follow Egret
CVE-2026-77596 · CVE record: PUBLISHED

Kubeflow Pipelines API server lacks authorization for shared pipeline uploads

kubeflow pipelines

Kubeflow Pipelines enables users to build and deploy portable, scalable machine learning workflows. Prior to 2.18.0, the multi-user HTTP endpoints POST /apis/v2beta1/pipelines/upload and POST /apis/v2beta1/pipelines/upload_version call canUploadVersionedPipeline, which returns without SubjectAccessReview when the target namespace is empty while REQUIRE_NAMESPACE_FOR_PIPELINES defaults to false. A low-privilege tenant can create shared pipelines or inject attacker-controlled versions into existing shared pipelines without the required write permission; if the API server is directly reachable without an authenticating proxy, an unauthenticated caller can exploit the same bypass, while deployments protected by such a proxy do not expose anonymous access. An enabled unpinned recurring run that follows the latest version can then execute the injected specification in another tenant's namespace under that workload's service account, while pinned or embedded-specification runs are not automatically substituted. This issue is fixed in version 2.18.0.

Exploitation evidence

Not listed in the latest downloaded CISA KEV catalog. This does not establish an absence of exploitation.

KEV checked 13 Nov 2026, 00:20 Jerusalem · Original catalog ↗

Reported products and versions

kubeflow / pipelines

Default status: Not specified

  • affected: < 2.18.0

Fixes and workarounds

No explicit solution text in the downloaded CVE record. Consult the vendor advisory; unaffected version ranges are shown above as reported, not inferred as a patch recommendation.

Sources and related reporting

CVE Program record ↗ · Download tracked evidence as JSON

Monitored source mentions

Shared CVE identifiers link source mentions; they do not establish that the reports describe the same incident.

Observed change timeline

History begins when Egret first downloads each source. It is not the complete upstream CVE history.

12 Nov 2026, 18:20 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-12",
  "epss": 0.0025,
  "percentile": 0.1654
}
12 Nov 2026, 00:20 Jerusalem · CVE Program record changed

Stored CNA snapshot at this observation.

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-77596",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-11-10T19:18:52.040869Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-11-10T19:19:32.017Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "exploit"
            ],
            "url": "https://github.com/kubeflow/pipelines/security/advisories/GHSA-rjr3-43j3-4q8g"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "pipelines",
          "vendor": "kubeflow",
          "versions": [
            {
              "status": "affected",
              "version": "< 2.18.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Kubeflow Pipelines enables users to build and deploy portable, scalable machine learning workflows. Prior to 2.18.0, the multi-user HTTP endpoints POST /apis/v2beta1/pipelines/upload and POST /apis/v2beta1/pipelines/upload_version call canUploadVersionedPipeline, which returns without SubjectAccessReview when the target namespace is empty while REQUIRE_NAMESPACE_FOR_PIPELINES defaults to false. A low-privilege tenant can create shared pipelines or inject attacker-controlled versions into existing shared pipelines without the required write permission; if the API server is directly reachable without an authenticating proxy, an unauthenticated caller can exploit the same bypass, while deployments protected by such a proxy do not expose anonymous access. An enabled unpinned recurring run that follows the latest version can then execute the injected specification in another tenant's namespace under that workload's service account, while pinned or embedded-specification runs are not automatically substituted. This issue is fixed in version 2.18.0."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 9.6,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-639",
              "description": "CWE-639: Authorization Bypass Through User-Controlled Key",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-862",
              "description": "CWE-862: Missing Authorization",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-11-05T22:23:13.049Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/kubeflow/pipelines/security/advisories/GHSA-rjr3-43j3-4q8g",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/kubeflow/pipelines/security/advisories/GHSA-rjr3-43j3-4q8g"
        },
        {
          "name": "https://github.com/kubeflow/pipelines/pull/14352",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/kubeflow/pipelines/pull/14352"
        },
        {
          "name": "https://github.com/kubeflow/pipelines/commit/62516d8c525f146b754cb515cf441dd0290ad841",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/kubeflow/pipelines/commit/62516d8c525f146b754cb515cf441dd0290ad841"
        },
        {
          "name": "https://github.com/kubeflow/pipelines/releases/tag/2.18.0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/kubeflow/pipelines/releases/tag/2.18.0"
        }
      ],
      "source": {
        "advisory": "GHSA-rjr3-43j3-4q8g",
        "discovery": "UNKNOWN"
      },
      "title": "Kubeflow Pipelines API server lacks authorization for shared pipeline uploads"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-77596",
    "datePublished": "2026-11-05T22:23:13.049Z",
    "dateReserved": "2026-08-20T20:48:20.507Z",
    "dateUpdated": "2026-11-10T19:19:32.017Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}
10 Nov 2026, 18:20 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-10",
  "epss": 0.0025,
  "percentile": 0.16505
}
10 Nov 2026, 12:20 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-09",
  "epss": 0.0025,
  "percentile": 0.16468
}
10 Nov 2026, 12:20 Jerusalem · CVE Program record changed

Stored CNA snapshot at this observation.

{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "pipelines",
          "vendor": "kubeflow",
          "versions": [
            {
              "status": "affected",
              "version": "< 2.18.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Kubeflow Pipelines enables users to build and deploy portable, scalable machine learning workflows. Prior to 2.18.0, the multi-user HTTP endpoints POST /apis/v2beta1/pipelines/upload and POST /apis/v2beta1/pipelines/upload_version call canUploadVersionedPipeline, which returns without SubjectAccessReview when the target namespace is empty while REQUIRE_NAMESPACE_FOR_PIPELINES defaults to false. A low-privilege tenant can create shared pipelines or inject attacker-controlled versions into existing shared pipelines without the required write permission; if the API server is directly reachable without an authenticating proxy, an unauthenticated caller can exploit the same bypass, while deployments protected by such a proxy do not expose anonymous access. An enabled unpinned recurring run that follows the latest version can then execute the injected specification in another tenant's namespace under that workload's service account, while pinned or embedded-specification runs are not automatically substituted. This issue is fixed in version 2.18.0."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 9.6,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-639",
              "description": "CWE-639: Authorization Bypass Through User-Controlled Key",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-862",
              "description": "CWE-862: Missing Authorization",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-11-05T22:23:13.049Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/kubeflow/pipelines/security/advisories/GHSA-rjr3-43j3-4q8g",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/kubeflow/pipelines/security/advisories/GHSA-rjr3-43j3-4q8g"
        },
        {
          "name": "https://github.com/kubeflow/pipelines/pull/14352",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/kubeflow/pipelines/pull/14352"
        },
        {
          "name": "https://github.com/kubeflow/pipelines/commit/62516d8c525f146b754cb515cf441dd0290ad841",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/kubeflow/pipelines/commit/62516d8c525f146b754cb515cf441dd0290ad841"
        },
        {
          "name": "https://github.com/kubeflow/pipelines/releases/tag/2.18.0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/kubeflow/pipelines/releases/tag/2.18.0"
        }
      ],
      "source": {
        "advisory": "GHSA-rjr3-43j3-4q8g",
        "discovery": "UNKNOWN"
      },
      "title": "Kubeflow Pipelines API server lacks authorization for shared pipeline uploads"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-77596",
    "datePublished": "2026-11-05T22:23:13.049Z",
    "dateReserved": "2026-08-20T20:48:20.507Z",
    "dateUpdated": "2026-11-05T22:23:13.049Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}
Egret — Back to top Egret