CVE-2026-127080 json
OpsTree BuildPiper before 2.7.0 Container Escape via Unrestricted HostPath Volumes
published 2d ago modified yesterday also EUVD-2026-125102
- cvss
- 9.9
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 43%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- OpsTree Solutions BuildPiper 2.7.0
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Check with FencerCISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- total
- Assessed
- yesterday
Exploit prediction
0.51% chance of exploitation in the next 30 days, higher than 43% of all scored CVEs (FIRST EPSS, 2026-11-14).
Exploits and checks
- gist.github.com https://gist.github.com/neelkotnis/b8c1cf47f829c28086fe78d8187eb938 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 9.4 | 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 |
| CNA | 3.1 | 9.9 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |
| CNA | 4.0 | 9.4 | 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/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 |
Affected products
- OpsTree Solutions BuildPiper
Classification
- Weakness
-
- CWE-269 Improper Privilege Management
References
-
gist.github.com
/neelkotnis/b8c1cf47f829c28086fe78d8187eb938
technical-description, exploit
-
buildpiper.io
/
product
-
vulncheck.com
/advisories/opstree-buildpiper-before-2.7.0-container-escape-via-unrestricted-hostpath-volumes
third-party-advisory
Sources
- CVE List CVE-2026-127080
- NVD CVE-2026-127080
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.