SSRF in Kubeflow Pipelines
CVE-2026-88979
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Kubeflow Pipelines — versions >= 2.17.0, < 2.18.0
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-88979?
- CVE-2026-88979 is a medium-severity vulnerability in Kubeflow Pipelines, classified under Use of Hard-coded Credentials. CVSS score: 5.8/10. Published 2026-11-05.
- How severe is CVE-2026-88979?
- Medium severity. CVSS v3 base score is 5.8 out of 10.