---
id: "CVE-2026-127073"
page: "https://infrastack.ai/live/CVE-2026-127073"
kind: "vulnerability"
aliases: ["CVE-2026-127073"]
title: "BuildPiper: project users can gain Kubernetes cluster-admin via manifests"
severity: "critical"
cvss: 9.9
epss: null
exploited: false
status: "open"
category: "other"
products: []
ecosystems: []
tags: ["buildpiper", "ci-cd", "kubernetes", "other"]
not_affected_if: ["version-2.7.0-or-later"]
published_at: "2026-11-13T10:18:03+00:00"
first_seen_at: "2026-11-13T10:47:28+00:00"
updated_at: "2026-11-13T10:48:11+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-127073", "first_seen_at": "2026-11-13T10:47:28+00:00"}]
exploit_sources: []
---

# BuildPiper: project users can gain Kubernetes cluster-admin via manifests

Link for people: https://infrastack.ai/live/CVE-2026-127073 (this .md is for agents)

OpsTree BuildPiper before 2.7.0 lets project users submit unrestricted manifests through its Additional Manifest feature. An attacker can deploy a ClusterRoleBinding granting cluster-admin, which the pipeline applies with cluster-wide credentials, giving control of all workloads and secrets.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check whether the BuildPiper version in use is below `2.7.0`.
- Look for the Additional Manifest feature in BuildPiper project settings and whether the pipeline applies it to a cluster.

## Fix

- BuildPiper: move to `2.7.0` or later.

## Timeline

- 2026-11-13T10:47:28+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-127073

## Documents

- [advisory] Third-party advisory: www.vulncheck.com https://www.vulncheck.com/advisories/opstree-buildpiper-before-2.7.0-privilege-escalation-via-additional-manifest

## From the sources

OpsTree BuildPiper before 2.7.0 contains a privilege escalation vulnerability that allows project users to gain Kubernetes cluster-admin rights by submitting unrestricted manifests through the Additional Manifest feature. Attackers can deploy a ClusterRoleBinding binding a service account to cluster-admin, which the pipeline applies with cluster-wide credentials, granting control over all workloads and secrets.

---

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