Privilege Escalation Vulnerability in OpsTree BuildPiper
CVE-2026-127073

9.4CRITICAL

Key Information:

Vendor

Opstree Solutions

Status
Buildpiper
Vendor
CVE Published:
13 November 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-127073?

OpsTree BuildPiper prior to version 2.7.0 is susceptible to a privilege escalation vulnerability. This flaw allows project users to submit unrestricted manifests via the Additional Manifest feature, which can be exploited to gain Kubernetes cluster-admin privileges. By deploying a ClusterRoleBinding that links a service account to cluster-admin, attackers can manipulate the pipeline and apply these credentials across the cluster. This provides unauthorized control over critical workloads and sensitive secrets, posing significant risks to the integrity and security of the Kubernetes environment.

Affected Version(s)

BuildPiper 0 < 2.7.0

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-127073 - Proof of Concept

References

https://gist.github.com/neelkotnis/7bc715e190e5be2c2fc5be...
technical-descriptionexploit
https://www.buildpiper.io/
product
https://www.vulncheck.com/advisories/opstree-buildpiper-b...
third-party-advisory

CVSS V4

Score:
9.4
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Neel Saurabh Kotnis
.