by Kastro
Paper/Archive/CVE-2026-127080

CVE-2026-127080

OpsTree Solutions BuildPiper — OpsTree BuildPiper before 2.7.0 Container Escape via Unrestricted HostPath Volumes

CVSS 9.9
critical.is priorityof 100
30
CVSS 9.9 (CNA)9.9 / 10 × 3029.7Not in CISA KEV+300.0No EPSS score.000 × 200.0No public exploit+100.0SSVC exploitation: unknown+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
BuildPiper< 2.7.02.7.0CNA

Scores by source

VulnCheck (CNA)9.9CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
VulnCheck (CNA)9.4CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

References

exploitgist.github.com/neelkotnis/b8c1cf47f829c28086fe78d8187eb938refbuildpiper.iowriteupvulncheck.com/advisories/opstree-buildpiper-before-2.7.0-container-escape-via-unrestricted-hostpath-volumes