Authorization Bypass in OpsTree BuildPiper Allows Environment Creation in Unauthorized Kubernetes Clusters
CVE-2026-127077

7.1HIGH

Key Information:

Vendor

Opstree Solutions

Status
Buildpiper
Vendor
CVE Published:
13 November 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-127077?

OpsTree BuildPiper versions prior to 2.7.0 have a vulnerability that permits authenticated users to bypass authorization controls, enabling them to create environments on Kubernetes clusters that are not assigned to their project. By manipulating the 'cluster_id' and 'namespaces' values in requests to the environment creation API, an attacker can post to a different project's cluster. This could lead to unauthorized builds and deployments, effectively compromising project isolation and security.

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-2026-127077 - Proof of Concept

References

https://gist.github.com/neelkotnis/e6ba937a2ea3f06fc0a79b...
technical-descriptionexploit
https://www.buildpiper.io/
product
https://www.vulncheck.com/advisories/opstree-buildpiper-b...
third-party-advisory

CVSS V4

Score:
7.1
Severity:
HIGH
Confidentiality:
Low
Integrity:
High
Availability:
None
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
.