CVE-2026-127078

Description

OpsTree BuildPiper before 2.7.0 contains an authorization bypass vulnerability that allows authenticated users to attach another application's environment to their service by supplying a foreign project_env_id. Attackers can configure CI and trigger builds and deployments through the component env endpoints using the other application's configuration, registries and deployment infrastructure.

Severity scores

Each score is shown as its source gave it. They are not averaged or merged.

• 7.1CVSS 4.0, Highfrom the CNA (VulnCheck)CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N
• 7.1CVSS 3.1, Highfrom the CNA (VulnCheck)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N

Historical context and remediation

This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.

No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.

No explicit remediation statement is available on this page yet. Consult the original record and vendor references before choosing a fix.

Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.

Read the original CVE record.

Affected products

Timeline

1. 13 Nov 2026 Published

Weakness

• CWE-639

References

• gist.github.comtechnical-descriptionexploit
• BuildPiper Product Pageproduct
• VulnCheck Advisory: OpsTree BuildPiper before 2.7.0 Authorization Bypass via project_env_id Parameterthird-party-advisory