Improper Authorization in OpsTree BuildPiper Affects Kubernetes Deployments
CVE-2026-127080

9.4CRITICAL

Key Information:

Vendor

Opstree Solutions

Status
Buildpiper
Vendor
CVE Published:
13 November 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-127080?

OpsTree BuildPiper prior to version 2.7.0 features an improper authorization vulnerability that permits authenticated deploy users to create arbitrary hostPath volumes in Kubernetes. This oversight allows attackers to set the hostPath to '/' in the Define HostPath Volume configuration, effectively mounting the worker node's root filesystem with read-write permissions. Such a configuration undermines container isolation, posing a significant risk of compromising both the node and the entire cluster.

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-2026-127080 - Proof of Concept

References

https://gist.github.com/neelkotnis/b8c1cf47f829c28086fe78...
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
.