{"id":"CVE-2026-88979","published":"2026-11-05T23:17:01.110","lastModified":"2026-11-05T23:17:01.110","description":"Kubeflow Pipelines enables users to build and deploy portable, scalable machine learning workflows. From 2.17.0 until 2.18.0, the TensorBoard proxy token introduced by the incomplete remediation for CVE-2026-54745 uses MINIO_SECRET_KEY as its HMAC secret, whose bundled default is publicly known. In an authorization-disabled deployment using that default, an unauthenticated attacker can forge a token containing a chosen viewerName and namespace; the proxy constructs the destination from the viewerName plus the -service suffix, the namespace, and the configured cluster domain, then reads responses on port 80 under the /tensorboard/<viewer>/ path. Resource-name validation and path-traversal rejection remain enforced, authorization-enabled deployments still check access to the selected namespace, and unrestricted metadata access, writes, or service disruption are not established. This issue is fixed in version 2.18.0.","cvssScore":5.8,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N","cwes":["CWE-798","CWE-918"],"vendors":[],"products":[],"references":[{"url":"https://github.com/kubeflow/pipelines/commit/c8effaed62476a8d8c99d3a6cfdd404a04ef99d8","tags":[]},{"url":"https://github.com/kubeflow/pipelines/pull/14346","tags":[]},{"url":"https://github.com/kubeflow/pipelines/releases/tag/2.18.0","tags":[]},{"url":"https://github.com/kubeflow/pipelines/security/advisories/GHSA-j429-j7xw-8j9h","tags":[]}],"exploitRefs":[{"url":"https://github.com/kubeflow/pipelines/commit/c8effaed62476a8d8c99d3a6cfdd404a04ef99d8","tags":[]},{"url":"https://github.com/kubeflow/pipelines/pull/14346","tags":[]},{"url":"https://github.com/kubeflow/pipelines/releases/tag/2.18.0","tags":[]},{"url":"https://github.com/kubeflow/pipelines/security/advisories/GHSA-j429-j7xw-8j9h","tags":[]}],"hasPoc":true,"ai":null}