Vulnerability-Lookup

CVE-2026-118759 (GCVE-0-2026-118759)

Vulnerability from cvelistv5 – Published: 2026-10-29 16:30 – Updated: 2026-10-30 17:13

Title

Kubeflow Pipelines: Run log streaming endpoint bypasses namespace authorization, exposing pod execution logs cross-tenant

Summary

Kubeflow Pipelines enables users to build and deploy portable, scalable machine learning workflows. Prior to 2.18.0, the API server's GET /apis/v1alpha1/runs/{run_id}/nodes/{node_id}/log handler retrieved logs without authorizing the caller against the selected run. A caller who can reach the backend and knows a victim run ID and suitable pod or node identifier can read live or archived logs with the API server's permissions. For live logs, the caller-controlled node ID was also accepted as a pod name without verifying that the pod belonged to the requested run, allowing a known run ID to select the namespace of an unrelated pod and read its main container logs. The handler does not authenticate requests itself, although an external authentication gate or network policy can limit reachability. Exposed logs can contain sensitive workload data or credentials. This issue is fixed in version 2.18.0.

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-30 15:47 UTC

CWE

CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
CWE-862 - Missing Authorization

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 8129 records in the last 180 days details

References

4 references

URL	Tags
https://github.com/kubeflow/pipelines/security/ad…	x_refsource_CONFIRM
https://github.com/kubeflow/pipelines/pull/13684	x_refsource_MISC
https://github.com/kubeflow/pipelines/commit/be47…	x_refsource_MISC
https://github.com/kubeflow/pipelines/releases/ta…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version	CPE status
kubeflow	pipelines	Affected: < 2.18.0	guessed

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-118759

Vulnerability from fkie_nvd - Published: 2026-10-29 17:18 - Updated: 2026-10-30 18:17

Severity

7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/kubeflow/pipelines/commit/be4723e33727c6dad71a95cba61e8f61562ab20f
	security-advisories@github.com	https://github.com/kubeflow/pipelines/pull/13684
	security-advisories@github.com	https://github.com/kubeflow/pipelines/releases/tag/2.18.0
	security-advisories@github.com	https://github.com/kubeflow/pipelines/security/advisories/GHSA-wg5q-x4j9-qm54

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "pipelines",
          "vendor": "kubeflow",
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    }
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  "lastModified": "2026-10-30T18:17:24.807",
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GHSA-WG5Q-X4J9-QM54

Vulnerability from github – Published: 2026-10-30 23:13 – Updated: 2026-10-30 23:13

Summary

Kubeflow Pipelines: Run-log endpoint permits unauthorized access to pod logs

Details

Summary

The Kubeflow Pipelines API server's GET /apis/v1alpha1/runs/{run_id}/nodes/{node_id}/log handler retrieves logs without authorizing the caller against the selected run. A caller who can reach the backend and knows a victim run ID and a suitable pod or node identifier can read live or archived logs using the API server's permissions.

For live logs, the vulnerable handler also accepts the supplied node ID as a pod name in the run's namespace without verifying that the pod belongs to the run. Depending on the API server's pod-log permissions, a known run ID can therefore permit reading the main container logs of an unrelated pod in that namespace. Logs may contain sensitive workload data or credentials.

The affected handler does not authenticate the request itself. An external authentication gate or network policy can restrict reachability; public ingress exposure and unauthenticated enumeration of run IDs are not assumed.

Remediation

Upgrade the API server to Kubeflow Pipelines 2.18.0. Versions through 2.17.3 are affected; the first affected release has not been established.

PR #13684 authorizes the caller with the readLog verb before retrieving live or archived logs. For live logs, it also verifies that the pod's pipeline/runid label matches the requested run. Custom Kubernetes roles must grant readLog on runs in the pipelines.kubeflow.org API group; the bundled viewer and editor roles include it. Shared read access alone does not grant log access.

Until upgrading, restrict access to the backend log endpoint. Focused regression tests cover authorization denial, HTTP identity propagation, pod/run mismatch, archive retrieval, and cancellation; no new deployed-cluster end-to-end test was performed for this assessment.

Credit

bugbunny.ai discovered and reported the issue. Nayyar (@naruto-lgtm) authored the fix in #13684.

@patchmyday, @thesecguy45, @VitoCrl, @Grg0rry, @arpitjain099, and @BrianWillows made later submissions concerning the run-log authorization gap. MUTEDCYBERSECURITY S.L. separately reported a synthetic two-tenant reproduction, including the unrelated-pod log path.

Severity

7.5 (High)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Show details on source website

JSON

To clipboard

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        "name": "github.com/kubeflow/pipelines"
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          "type": "ECOSYSTEM"
        }
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        "name": "github.com/kubeflow/pipelines"
      },
      "versions": [
        "1.7.0-alpha.3"
      ]
    }
  ],
  "aliases": [
    "CVE-2026-118759"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-200",
      "CWE-862"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-10-30T23:13:29Z",
    "nvd_published_at": "2026-10-29T17:18:06Z",
    "severity": "HIGH"
  },
  "details": "## Summary\n\nThe Kubeflow Pipelines API server\u0027s `GET /apis/v1alpha1/runs/{run_id}/nodes/{node_id}/log` handler retrieves logs without authorizing the caller against the selected run. A caller who can reach the backend and knows a victim run ID and a suitable pod or node identifier can read live or archived logs using the API server\u0027s permissions.\n\nFor live logs, the vulnerable handler also accepts the supplied node ID as a pod name in the run\u0027s namespace without verifying that the pod belongs to the run. Depending on the API server\u0027s pod-log permissions, a known run ID can therefore permit reading the `main` container logs of an unrelated pod in that namespace. Logs may contain sensitive workload data or credentials.\n\nThe affected handler does not authenticate the request itself. An external authentication gate or network policy can restrict reachability; public ingress exposure and unauthenticated enumeration of run IDs are not assumed.\n\n## Remediation\n\nUpgrade the API server to **[Kubeflow Pipelines 2.18.0](https://github.com/kubeflow/pipelines/releases/tag/2.18.0)**. Versions through 2.17.3 are affected; the first affected release has not been established.\n\n[PR #13684](https://github.com/kubeflow/pipelines/pull/13684) authorizes the caller with the `readLog` verb before retrieving live or archived logs. For live logs, it also verifies that the pod\u0027s `pipeline/runid` label matches the requested run. Custom Kubernetes roles must grant `readLog` on `runs` in the `pipelines.kubeflow.org` API group; the bundled viewer and editor roles include it. Shared read access alone does not grant log access.\n\nUntil upgrading, restrict access to the backend log endpoint. Focused regression tests cover authorization denial, HTTP identity propagation, pod/run mismatch, archive retrieval, and cancellation; no new deployed-cluster end-to-end test was performed for this assessment.\n\n## Credit\n\n[bugbunny.ai](https://bugbunny.ai) discovered and reported the issue. Nayyar ([@naruto-lgtm](https://github.com/naruto-lgtm)) authored the fix in #13684.\n\n[@patchmyday](https://github.com/patchmyday), [@thesecguy45](https://github.com/thesecguy45), [@VitoCrl](https://github.com/VitoCrl), [@Grg0rry](https://github.com/Grg0rry), [@arpitjain099](https://github.com/arpitjain099), and [@BrianWillows](https://github.com/BrianWillows) made later submissions concerning the run-log authorization gap. **MUTEDCYBERSECURITY S.L.** separately reported a synthetic two-tenant reproduction, including the unrelated-pod log path.",
  "id": "GHSA-wg5q-x4j9-qm54",
  "modified": "2026-10-30T23:13:29Z",
  "published": "2026-10-30T23:13:29Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/kubeflow/pipelines/security/advisories/GHSA-wg5q-x4j9-qm54"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-118759"
    },
    {
      "type": "WEB",
      "url": "https://github.com/kubeflow/pipelines/pull/13684"
    },
    {
      "type": "WEB",
      "url": "https://github.com/kubeflow/pipelines/commit/be4723e33727c6dad71a95cba61e8f61562ab20f"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/kubeflow/pipelines"
    },
    {
      "type": "WEB",
      "url": "https://github.com/kubeflow/pipelines/releases/tag/2.18.0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Kubeflow Pipelines: Run-log endpoint permits unauthorized access to pod logs"
}

Sightings

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CVE-2026-118759 (GCVE-0-2026-118759)

FKIE_CVE-2026-118759

GHSA-WG5Q-X4J9-QM54

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