PT-2026-58986 · Go · Github.Com/Woodpecker-Ci/Woodpecker+2

Published

2026-07-14

·

Updated

2026-07-14

CVSS v4.0

8.2

High

VectorAV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Impact

A privilege escalation vulnerability affects Woodpecker instances using the Kubernetes backend.
The pipeline option backend options.kubernetes.serviceAccountName was passed directly to the pod spec without any admin gating.
Who is impacted: any operator running the Kubernetes backend. Any user with Push permission on a connected repository can run pipeline pods under an arbitrary ServiceAccount in the pipeline namespace, gaining that account's RBAC permissions. If a privileged ServiceAccount is reachable in that namespace, this can lead to secret exfiltration (database credentials, API keys, TLS certs) and full cluster takeover.

Patches

https://github.com/woodpecker-ci/woodpecker/pull/6792

Workarounds

Operators who cannot upgrade immediately can mitigate by any of:
  • Restrict Push access on repositories connected to the Kubernetes-backed instance to trusted users only.
  • Harden the pipeline namespace: ensure no privileged ServiceAccount exists or is bound in the namespace where pipeline pods run; keep the default ServiceAccount minimally privileged.
  • Disable ServiceAccount token automounting for ServiceAccounts that should not be used by pipelines.
  • Enforce an admission policy (e.g. OPA/Gatekeeper, Kyverno, or a ValidatingAdmissionPolicy) that rejects pipeline pods setting an unexpected serviceAccountName.
  • Use a dedicated, isolated namespace per org/instance with no sensitive RBAC bindings.

Resources

  • Vulnerable option introduced in commit 609ba481b5e912f59aaae8ca7bc22b44523c5e37
  • Affected versions: v1.0.0 through v3.15.0
  • Source: pipeline/backend/kubernetes/backend options.go (field ServiceAccountName), pipeline/backend/kubernetes/pod.go (assigned to pod spec with no gating)

Fix

Missing Authorization

Improper Privilege Management

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Weakness Enumeration

CWE-862CWE-269

Related Identifiers

GHSA-QF34-295C-26V8

Affected Products

Github.Com/Woodpecker-Ci/Woodpecker
Go.Woodpecker-Ci.Org/Woodpecker/V2
Go.Woodpecker-Ci.Org/Woodpecker/V3