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CVE-2026-127080 OpsTree BuildPiper before 2.7.0 Container Escape via Unrestricted HostPath Volumes

9.4 criticalEPSS 0.5%

Critical (9.4) in opstree solutions buildpiper. EPSS 0.5% estimated probability of exploitation activity in the next 30 days.

On this page
OpsTree BuildPiper before 2.7.0 contains an improper authorization vulnerability that allows authenticated deploy users to define arbitrary Kubernetes hostPath volumes without allow-list or policy checks. Attackers can set the host path to / in the Define HostPath Volume configuration to mount the worker node root filesystem read-write, breaking container isolation and enabling node and cluster compromise.

Severity

CVSS 4.0

9.4 critical
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

CVSS 3.1

9.9 critical
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
EPSS
0.5% estimated probability of exploitation activity in the next 30 days; 44th percentile. Scored 2026-11-13. A forecast for this CVE across the internet, not for your own systems.
CISA's assessment (SSVC)
Exploitation: PoC · Automatable: no · Technical impact: total, assessed 2026-11-13. From CISA's Vulnrichment in the CVE List: whether it is exploited, whether exploiting it can be automated, and how much control it gives.
CWE
CWE-269 Improper Privilege Management
OWASP Top 10
A06:2025 Insecure Design
Published
Modified
Assigned by
VulnCheck (CNA)
NVD analysis
Deferred: the NVD does not plan to analyze it
Record from
the NVD, synced

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Affected

  • opstree solutions:buildpiper

Versions

From the CNA's record in the CVE List.

ProductAffected
OpsTree Solutions BuildPiperbefore 2.7.0

Attack patterns (CAPEC)

  • CAPEC-58 Restful Privilege Elevation Likelihood: High · Severity: High
  • CAPEC-122 Privilege Abuse Likelihood: High · Severity: Medium
  • CAPEC-233 Privilege Escalation

The attack patterns MITRE's CAPEC relates to this record's weaknesses, as MITRE names them. Credits.

History

  1. The NVD deferred its analysis

Changes since this site first stored the record. The same for every record: /api/public/changes.

References

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