Automotive digital identity exposes a widening NHI governance gap

At a glance

What this is: This is an analysis of automotive digital identity security, with a focus on how connected vehicles, manufacturing systems, and supply chain access expand the NHI and IAM attack surface.

Why it matters: It matters because automotive environments combine operational technology, cloud services, suppliers, and machine identities, which makes identity governance a cross-domain control problem rather than a single-team issue.

👉 Read CyberArk's analysis of automotive digital identity and connected vehicle risk

Context

Automotive digital identity security is the problem of proving who or what can talk to connected vehicles, manufacturing systems, and shared data services. In practice, the identity surface now includes service accounts, device credentials, partner access, and automation across production, supply chain, and cloud environments, which conventional IAM programmes often treat as separate domains.

The article argues that connected vehicle technology and V2X increase both safety value and cyber risk because trust is distributed across many systems. For NHI governance teams, that means the real issue is not only user access, but how machine identities, privileged pathways, and third-party integrations are verified, monitored, and revoked across the automotive lifecycle.

Key questions

Q: How should automotive teams govern machine identities across connected vehicle environments?

A: Treat machine identities as first-class assets with owners, expiry dates, rotation schedules, and revocation paths. Automotive teams should inventory every certificate, token, API key, and service account across vehicles, plants, suppliers, and cloud services, then enforce least privilege and continuous review. If an identity cannot be traced to a business purpose, it should not be trusted.

Q: When does just-in-time access make more sense than standing privilege in automotive operations?

A: Just-in-time access is the better choice when elevated permissions are needed only for maintenance, release, incident response, or supplier support. In automotive environments, standing privilege creates avoidable blast radius because access often spans design, production, and partner systems. Use JIT when access is task-scoped, time-bound, and auditable.

Q: What is the difference between securing V2X traffic and securing automotive identities?

A: Securing V2X traffic focuses on the communications path, while securing automotive identities focuses on who or what is allowed to send, receive, or act on that traffic. Both matter, but identity controls determine whether a connected vehicle, service, or supplier system should be trusted at all. Without identity assurance, encrypted traffic can still carry harmful commands or data.

Q: Why do automotive supply chains increase non-human identity risk?

A: Automotive supply chains increase NHI risk because every supplier connection adds credentials, integrations, and privilege pathways that can outlive their original purpose. If those identities are not rotated, reviewed, and revoked, a compromise in one organisation can spread into engineering, manufacturing, or telemetry environments. The risk is structural, not occasional.

Technical breakdown

V2X trust chains and automotive NHI exposure

Vehicle-to-everything, or V2X, creates a trust chain that spans cars, roadside systems, cloud services, and partner infrastructure. Each hop introduces an identity decision: whether the sender is legitimate, whether the credential is still valid, and whether the message should be trusted in context. That makes the automotive environment dependent on machine identity assurance, not just network segmentation. If identities are weak, stolen, or over-privileged, an attacker can exploit the chain even when the network itself appears protected. The security model therefore has to treat every connected component as an identity-bearing actor.

Practical implication: Practitioners should inventory every machine identity that participates in V2X flows and require explicit authentication, rotation, and revocation controls.

Privileged pathways across manufacturing and supplier systems

Automotive manufacturing creates a dense web of privileged access, from engineering repositories to plant-floor automation and supplier portals. The article’s attack-chain framing matters because credential theft in one environment can become lateral movement into design data, production systems, or collaboration tools. This is a classic NHI problem: service accounts, APIs, and automation often outlive the humans who set them up and are rarely reviewed with the same discipline as employee access. In automotive programmes, privilege is not a static role. It is a moving path that changes across development, production, and partner integrations.

Practical implication: Security teams should map privileged pathways end to end and apply JIT access where production or engineering access does not need to persist.

Identity verification for connected vehicles and data exchange

Secure identity verification in automotive environments means more than login. It includes device authentication, service-to-service trust, certificate validity, and monitoring for anomalous access between systems that exchange telemetry, safety data, and manufacturing records. Because vehicles and backend services interact continuously, compromise can spread through trusted connections rather than through obvious user interaction. That is why authentication, authorisation, and monitoring must be designed together. A control that works for a human user often fails when applied to a fleet of vehicles, APIs, and autonomous workflows acting at machine speed.

Practical implication: Teams should align identity verification controls with machine-to-machine flows and continuously validate certificates, tokens, and secrets.

Threat narrative

Attacker objective: The attacker aims to use one compromised identity to access privileged automotive systems and expose or disrupt high-value design and production assets.

1. Entry occurs when attackers steal credentials through social engineering or other access abuse in the automotive environment.
2. Escalation follows when the compromised identity is used to move laterally across connected engineering, manufacturing, or supplier systems.
3. Impact occurs when the attacker reaches production secrets, design data, or operational workflows that affect vehicle safety and business continuity.

Breaches seen in the wild

• Shai Hulud npm malware campaign — Shai Hulud campaign: npm malware exposed secrets on GitHub.
• Reviewdog GitHub Action supply chain attack — reviewdog/action-setup GitHub Action supply chain attack exposed secrets.

Read our 52 NHI Breaches Analysis report for a comprehensive view of breaches impacting Non-Human Identities including AI Agents.

NHI Mgmt Group analysis

Automotive identity security is now an NHI governance problem, not only a vehicle security problem. The article correctly centres connected vehicles, but the deeper issue is that vehicles, factories, suppliers, and cloud services now depend on machine identities with different lifecycles and trust assumptions. That means identity policy has to follow the asset across design, production, and operations. Practitioners should govern the identity plane as part of the automotive attack surface.

Privilege in automotive environments behaves like a supply chain, not a single access tier. Engineering access, plant access, partner access, and API access can all chain together once one credential is compromised. This is where conventional role models break down, because a role may be valid in one phase of the lifecycle and dangerous in another. Practitioners should design for blast-radius reduction across domains, not just for simpler access administration.

V2X expands the trust boundary faster than most IAM programmes can absorb. Connected vehicles create continuous machine-to-machine exchange, which makes standing credentials and static trust relationships increasingly fragile. The security question is no longer whether an identity can authenticate once, but whether it should still be trusted after context changes. Practitioners should move toward short-lived, context-aware credentials and tighter certificate governance.

Automotive compliance pressures make identity evidence a board-level issue. The article links security, regulation, privacy, and collaboration, which reflects how identity controls now support both operational resilience and auditability. That combination matters because manufacturers must show who had access, when it was granted, and how quickly it was removed. Practitioners should treat identity telemetry as compliance evidence, not just security logging.

Identity blast radius is the right concept for connected manufacturing. A compromised service account or API key can reach far beyond the system where it originated. In automotive environments, that blast radius may include blueprints, assembly output, supplier interfaces, or telemetry pipelines. Practitioners should measure access by potential impact, then reduce standing privilege wherever a compromise could propagate.

From our research:

• Only 20% have formal processes for offboarding and revoking API keys, and even fewer have procedures for rotating them, according to Ultimate Guide to NHIs.
• 71% of NHIs are not rotated within recommended time frames, increasing the risk of compromise over time, according to Ultimate Guide to NHIs.
• For teams building a control baseline, Top 10 NHI Issues outlines the recurring governance failures that make machine trust hard to sustain.

What this signals

Automotive security programmes should treat connected vehicles as identity ecosystems, not isolated endpoints. That shift changes how teams budget for certificate lifecycle management, supplier onboarding, and audit evidence, because the control problem now spans IT, OT, and external trust boundaries.

Identity blast radius: the practical measure of how far a stolen credential can reach across engineering, manufacturing, and vehicle-connected systems. With 96% of organisations storing secrets outside secrets managers in vulnerable locations including code, config files, and CI/CD tools, per the Ultimate Guide to NHIs, the challenge is no longer visibility alone but containment and rapid revocation.

As automotive platforms become more software-defined, practitioners should align governance with NIST Cybersecurity Framework 2.0 and Zero Trust Architecture principles. That means verifying every non-human identity continuously, limiting trust duration, and preserving evidence for compliance reviews and incident response.

For practitioners

• Map the automotive identity plane Create an inventory of every human and non-human identity across engineering, manufacturing, supplier, and vehicle-connected systems. Include service accounts, API keys, certificates, automation users, and partner credentials so the full trust graph is visible.
• Reduce standing privilege in production paths Replace persistent elevated access with just-in-time access for factory systems, engineering repositories, and partner administration flows. Require approval, expiration, and logging for each elevation so access does not remain available after the task ends.
• Harden certificate and secret governance Enforce rotation, revocation, and expiry checks for machine credentials used in vehicle, plant, and cloud integrations. Tie every secret to an owner and a lifecycle so orphaned credentials do not remain trusted after system or vendor changes.
• Separate supplier trust from internal trust Treat third-party access as a distinct trust zone with its own authentication, monitoring, and review cadence. Validate every supplier connection against the minimum required scope, especially where shared tooling or production data is involved.

Key takeaways

• Automotive digital identity expands the NHI attack surface across vehicles, factories, suppliers, and cloud services.
• Privileged access in connected automotive environments creates a large blast radius unless teams control lifecycle, revocation, and trust boundaries.
• Security teams should govern machine identities as operational assets, with short-lived access and continuous verification built into the programme.

Key terms

• Non-Human Identity: A non-human identity is any digital identity used by software, devices, workloads, or automation rather than a person. In automotive environments this includes service accounts, APIs, certificates, and connected systems that need governed access, ownership, rotation, and revocation like any other identity asset.
• Vehicle-to-everything: Vehicle-to-everything, or V2X, is the communication model that allows vehicles to exchange data with other vehicles, infrastructure, networks, and related systems. It creates a wider trust boundary because each message depends on identity assurance, certificate validity, and access controls beyond the vehicle itself.
• Identity blast radius: Identity blast radius is the amount of damage a compromised credential can cause before it is detected and revoked. In automotive programmes, it reflects how far a stolen secret can move across engineering, manufacturing, supplier, and telemetry systems, making lifecycle control a core risk-reduction measure.

Deepen your knowledge

Automotive digital identity, machine trust, and NHI lifecycle governance are core topics in our NHI Foundation Level course, the industry's only accredited NHI security programme. If you are building controls for connected vehicles or manufacturing systems, it is worth exploring.

This post draws on content published by CyberArk: How Secure is Automotive Digital Identity? Read the original.