Authorization Bypass in OpsTree BuildPiper Affects Project Isolation
CVE-2026-127081

5.3MEDIUM

Key Information:

Vendor

Opstree Solutions

Status
Buildpiper
Vendor
CVE Published:
13 November 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-127081?

The OpsTree BuildPiper software prior to version 2.7.0 contains a vulnerability that permits authenticated users to bypass project separation controls. By utilizing an incorrect project_env_id, users can link pipeline stages to environments belonging to other projects. This exploitation allows for unauthorized access to resources across projects, which could lead to security breaches by creating cross-project associations without appropriate permissions.

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-2026-127081 - Proof of Concept

References

https://gist.github.com/neelkotnis/0f4aaf3d9ab99950c7f643...
technical-descriptionexploit
https://www.buildpiper.io/
product
https://www.vulncheck.com/advisories/opstree-buildpiper-b...
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
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
.