Path Traversal Vulnerability in OpsTree BuildPiper Affects Software Configuration
CVE-2026-127074

5.3MEDIUM

Key Information:

Vendor

Opstree Solutions

Status
Buildpiper
Vendor
CVE Published:
13 November 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-127074?

OpsTree BuildPiper versions prior to 2.7.0 are susceptible to a path traversal vulnerability, enabling authenticated users with build configuration permissions to access sensitive files on the build worker. By providing unvalidated inputs for dockerfile_path and build context parameters, attackers can utilize directory traversal techniques to specify absolute paths, such as /etc/passwd, through the CI configuration endpoint. Once a build is triggered, the contents of these sensitive files may be disclosed in the build logs, potentially leading to unauthorized data exposure and system compromise.

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-2026-127074 - Proof of Concept

References

https://gist.github.com/neelkotnis/58e88fa3decf9e0145bf28...
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:
Low
Integrity:
None
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
.