GCP Penetration Test Cost (2026): $13K to $40K

GCP pentest pricing by scope

GCP IAM scope detail

GCP's IAM model is structurally simpler than AWS or Azure: principals receive roles at a specific resource scope (organisation, folder, project, or individual resource). The pentest scope item that consumes the most testing time is service account impersonation chain analysis. Service accounts in GCP can be impersonated by users with iam.serviceAccountTokenCreator or iam.serviceAccountUser roles, and impersonation chains can produce privilege escalation paths that are not obvious from individual role grants.

A reputable GCP pentest will explicitly enumerate impersonation chains across the project surface, identify any service accounts with broad roles (Editor, Owner) that can be impersonated by lower-privileged users, and verify that organisation policies (deny policies in particular) constrain the impersonation surface where expected.

A second IAM scope area is service account key handling. GCP allows service accounts to have static JSON keys, which are a frequent source of credential leakage (committed to source control, exposed via environment variables). The tester typically reviews how service account keys are issued, whether rotation is enforced, and whether key creation is restricted via organisation policy.

GCP pentest scope by service category

The customer side of the GCP shared responsibility model governs what an engagement covers. Most GCP pentest engagements focus on the categories below.

GKE Workload Identity testing

Workload Identity is GCP's recommended pattern for giving Kubernetes pods access to Google Cloud APIs. It binds a Kubernetes Service Account (KSA) to a Google Cloud service account (GSA), and the binding is authenticated via the cluster's metadata server without static credentials inside the pod. Adoption is high in production GKE environments because it is the only secure-by-default option.

Pentest scope for Workload Identity covers three layers: the IAM bindings between KSAs and GSAs (whether a low-privileged KSA can impersonate a high-privileged GSA), the Kubernetes RBAC governing pod creation and namespace access (a user who can create pods in a namespace inherits the KSA's access), and the GSA-side IAM permissions (whether the bound GSA has broader Google Cloud permissions than the application actually needs).

A common Workload Identity finding is over-broad GSA permissions on the bound service account. The binding itself is correct, but the GSA carries roles like Editor or Storage Admin where it really only needs read access to a specific bucket.

Anthos hybrid scoping

For organisations running Anthos (GCP's hybrid Kubernetes offering, with clusters spanning GCP and on-premises or other clouds), pentest scope expands meaningfully. The Anthos control plane in GCP coordinates configuration across clusters via Config Sync and Policy Controller, and the trust model spans whatever environments are enrolled.

Anthos hybrid pentests typically run $35,000-$50,000+ because the scope includes both the GCP-side control plane and the on-premises cluster security posture. Plan for 15-22 testing days and budget for on-site time at the on-premises sites.