November 14, 2026

CVE Watchtower

CVE-2026-127080OpsTree Solutions BuildPiper Improper Privilege Management

NVD

Vulnerability 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.
Severity Level
CRITICAL(9.4)
Published Date
Nov 13, 2026
Last Modified
Nov 13, 2026
Exploitation Status
Public exploit available
EPSS Score (30-Day)
0.51%Probability
Root Weakness (CWE)
CWE-269: Improper Privilege Management ↗
The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control.
CVSS v4.0 Base Metrics — Score 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
Attack VectorNetwork
Attack ComplexityLow
Attack RequirementsNone
Privileges RequiredLow
User InteractionNone
Confidentiality (Vulnerable System)High
Integrity (Vulnerable System)High
Availability (Vulnerable System)High
Confidentiality (Subsequent System)High
Integrity (Subsequent System)High
Availability (Subsequent System)High
Show CVSS v3.x metrics (score 9.9)
CVSS v3.1 Base Metrics — Score 9.9 (CRITICAL)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredLow
User InteractionNone
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

Affected & Patched Versions

Affected Versions
  • OpsTree Solutions BuildPiper < 2.7.0
Patched Versions
  • OpsTree Solutions BuildPiper 2.7.0

What to do

Prioritize this fix. Exploit code is public, so attacks can follow quickly.

  1. Check whether you run OpsTree Solutions BuildPiper and which version.
  2. Update to a patched version listed above, then confirm the new version.
  3. Review logs and exposed services for signs of earlier compromise.

Timeline

  • Nov 13, 2026Published
  • Nov 13, 2026PoC status changed: POC to UNKNOWN
  • Nov 13, 2026PoC status changed: POC to UNKNOWN
  • Nov 13, 2026Record last modified
  • Nov 14, 2026PoC status changed: POC to UNKNOWN
  • Nov 14, 2026PoC status changed: POC to UNKNOWN

Score, severity and exploitation changes are tracked from the day Watchtower started logging them.

Get notified about new OpsTree Solutions BuildPiper CVEsYou are reading CVE-2026-127080. Get an email when KEV listings, exploits or new CVEs match your stack.
Set up CVE alerts

External References

Data last checked: Nov 14, 2026 00:39 UTC