Vulnerability record
CVE-2026-127077
The short answer
CVE-2026-127077 affects OpsTree Solutions BuildPiper and is rated high (CVSS 7.1). It is not in CISA's KEV catalog; EPSS puts the chance of exploitation in the next 30 days at 0.37%.
What it is
OpsTree BuildPiper before 2.7.0 contains an authorization bypass vulnerability that allows authenticated users to create environments on unassigned Kubernetes clusters by tampering with cluster_id and namespaces values. Attackers can modify requests to POST /api/v1/project/{project_id}/env/ to target another project's cluster, then trigger builds and deployments into it, bypassing project isolation.
Weakness: CWE-862.
Severity
7.1 high
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Exploited (CISA KEV)
Not listed
CISA lists confirmed exploitation only
EPSS, next 30 days
0.37%
Higher than 31% of scored CVEs
How it can be exploited
- Attack vector
- Network
- Attack complexity
- Low
- Attack requirements
- None
- Privileges required
- Low
- User interaction
- None
- Confidentiality impact
- Low
- Integrity impact
- High
- Availability impact
- None
Affected products
BuildPiper. NVD's record lists the exact affected versions.
References
Questions
Is CVE-2026-127077 being exploited?
It is not in CISA's Known Exploited Vulnerabilities catalog as of 2026-11-13. FIRST's EPSS estimates a 0.37% chance of exploitation in the next 30 days.
How do I fix CVE-2026-127077?
Follow the vendor advisory in the references below. NVD lists the affected versions under its configurations.
From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Deferred. The description is NVD's text, quoted as published.
Related
Know the day a CVE lands in your code
Connect a GitHub repository and ZeusQA checks its dependencies daily, briefs each advisory and opens the fix. Three test runs free, no card.