TL;DR: Shared secrets for machines outnumber human secrets by 20 to 45 times, and the article argues that secret sprawl persists because applications still authenticate with long-lived credentials stored in code, files, and CI/CD systems, according to Defakto Security. The governance shift is from rotating secrets more often to removing shared secrets from the operating model entirely.
At a glance
What this is: This is an analysis of why secret sprawl persists across machine and workload environments, and why long-lived shared credentials keep creating NHI governance exposure.
Why it matters: IAM and NHI teams need to treat secret sprawl as an identity operating-model problem, because rotation alone does not remove the exposure that comes from shared credentials living across development and production paths.
Context
Secret sprawl is the accumulation of shared credentials across applications, pipelines, files, repositories, and cloud services. In NHI terms, it is what happens when workloads prove identity with secrets that must be copied, stored, and protected everywhere they are used.
The governance gap is not just volume, but persistence. When the same credential exists in multiple environments and stages, ownership, offboarding, and revocation become slow and error-prone, which is why secret management tools reduce exposure but do not eliminate the underlying identity risk.
Key questions
Q: What breaks when shared machine secrets are not removed from the operating model?
A: What breaks is not just storage discipline but the trust model itself. Shared secrets can be copied into code, logs, pipelines, and workstations, which makes ownership diffuse and revocation incomplete. That leaves workloads authenticating through credentials that are easy to expose and hard to retire cleanly.
Q: Why do shared NHI secrets create a bigger risk than simple credential sprawl?
A: Because each copy extends the number of places a credential can be used if it leaks. A shared secret is still a valid authenticator wherever it is accepted, so one exposure can become multiple unauthorized access paths across development, testing, and production.
Q: How do security teams know when secret sprawl is becoming unmanageable?
A: When they cannot confidently answer where each secret exists, which workloads depend on it, and how quickly it can be retired without breaking business services. If the answer requires manual archaeology across code, tickets, and pipelines, the sprawl is already beyond routine control.
Q: Should organisations move from managing secrets to managing machine identities?
A: Yes, where the platform allows it. Managing identities instead of shared secrets reduces duplication, narrows blast radius, and gives teams a cleaner lifecycle model for issuance, renewal, and revocation. The goal is not better secret storage, but fewer secrets in the first place.
Technical breakdown
Why shared secrets create persistent machine identity risk
Shared secrets are reusable authenticators, so any place they are copied becomes part of the trust boundary. In NHI systems, that means a credential may exist in source code, a developer laptop, CI/CD variables, a secret manager, and runtime memory at the same time. The more places a secret exists, the harder it becomes to know who can use it, where it was exposed, or whether it can be revoked without breaking production. That is why secret sprawl is not just storage clutter. It is a governance failure in the identity lifecycle of the workload itself.
Practical implication: Treat every copied secret as an unmanaged identity instance until you can prove otherwise.
Why static credentials break workload identity governance
Static credentials force machine identity to behave like human password authentication, which is a poor fit for automated systems. Workloads do not need a reusable secret to establish trust if the platform can attest the workload and issue a verifiable identity instead. The article’s core architectural point is that secrets managers can hide the symptom, but they still preserve the model of shared secret usage. Modern NHI systems move the trust decision to issuance and attestation, not to repeated presentation of a password-like token.
Practical implication: Shift design reviews from secret storage to workload attestation and identity issuance.
How secret sprawl expands across the development lifecycle
Secret sprawl often begins in development, then multiplies during testing, debugging, deployment, and emergency support. A credential created to make a feature work ends up copied into staging, checked into code, left on a workstation, or embedded in a CI/CD workflow. That creates a lifecycle problem, not a one-time misconfiguration. Once a secret is used across multiple stages, the offboarding question becomes harder than the onboarding question, because every copy is a potential access path that must be found and removed.
Practical implication: Map secret locations by lifecycle stage, not only by application or repository.
Threat narrative
Attacker objective: The attacker wants valid access through legitimate-looking machine credentials so they can reach data and services without triggering obvious authentication alarms.
- Entry occurs when a shared secret is copied into code, files, CI/CD systems, or other readable locations and later exposed through one of those paths.
- Credential access follows because the same secret can be reused anywhere the workload authenticates, giving the attacker a valid trust token rather than a noisy exploit.
- Escalation happens when that credential reaches databases, cloud services, or customer-facing systems with broader access than the originating application needed.
- Impact is data exposure, unauthorized service access, or breach amplification across multiple customer or production environments.
Breaches seen in the wild
- Twitch breach 2021: A server misconfiguration leaked Twitch source code and payouts; the repositories held nearly 6,600 secrets, including 194 AWS keys.
- Home Depot Year-Long Token Exposure: Home Depot exposes authentication tokens in public repository for over a year before remediation.
Read our 52 NHI Breaches Analysis report for a comprehensive view of breaches impacting Non-Human Identities including AI Agents.
NHI Mgmt Group analysis
Secret sprawl is an identity governance problem, not a vaulting problem. Secret managers reduce storage risk, but they do not remove the operational reality that shared credentials must be copied, distributed, and later revoked. That means the control surface remains fragmented across code, endpoints, pipelines, and runtime systems. Practitioners should treat secret sprawl as evidence that the workload identity model is still immature.
Identity-first infrastructure is the cleaner security model for workloads. The article’s central argument is that workloads should prove who they are with verifiable identity, not with reusable shared secrets. That aligns with the direction of modern NHI governance: fewer shared credentials, less blast radius, and clearer ownership. The practical conclusion is that the real control objective is to eliminate the need for secrets where the platform can support attested identity.
Secret rotation is a containment tactic, not a governance strategy. Rotation can shorten exposure, but it does not address the root cause when credentials are being copied into too many places. Once a secret is embedded in development and deployment workflows, revocation becomes operationally expensive and often incomplete. The implication is that teams should judge their NHI maturity by how often they can remove shared secrets entirely, not by how often they rotate them.
Shared secrets turn lifecycle failure into breach potential. A credential that survives across development, staging, production, and debugging has already outlived the control assumptions behind it. That is why offboarding, inventory, and revocation need to be treated as identity lifecycle controls for machines, not just as hygiene tasks. The practitioner takeaway is to align NHI governance with where secrets actually live and move.
Secret sprawl creates identity blast radius. Every duplicate credential widens the number of systems that can be reached if one copy is exposed. That is the governance concept this article sharpens: once identity is shared, compromise is no longer local to one application or one team. Security programmes should measure and reduce the number of places a single credential can unlock.
What this signals
Identity blast radius is the better way to frame secret sprawl. When one credential appears in code, CI/CD, and runtime paths, the security issue is no longer a single secret but the number of systems that inherit its trust. That is why NHI programmes should measure credential reuse and copy count, not just rotation frequency.
NHI governance should now focus on where shared secrets are created, duplicated, and retired across the lifecycle. The practical shift is to move controls earlier, toward issuance and workload attestation, because by the time a secret is widely distributed, the cleanup cost is already part of the risk.
The article reinforces a simple operational truth: secret managers can reduce the pain of secrets, but they do not change the fact that copied credentials remain copied credentials. Teams that want lower exposure need to reduce dependency on shared secrets, especially in development and CI/CD paths.
For practitioners
- Inventory every shared machine secret Map secrets across code repositories, developer workstations, CI/CD systems, and runtime environments so you know where credentials exist and who can reach them.
- Replace reusable secrets with workload identity Prioritise applications that can use attested workload identity instead of usernames, passwords, or API keys, especially where automation already exists.
- Shorten the exposure window for exposed secrets Build a rapid revocation path for any secret found in code, logs, chat, or deployed systems, then confirm every copy is removed from downstream environments.
- Audit lifecycle ownership for machine credentials Assign explicit ownership for each secret so rotation, revocation, and retirement are tied to the application lifecycle rather than left to platform teams alone.
- Pilot identity-first access for new services Use new applications and services as the starting point for eliminating shared credentials so the programme reduces future sprawl instead of only cleaning up old debt.
Key takeaways
- Secret sprawl is a machine identity governance problem because shared credentials create duplicated trust across code, pipelines, and runtime systems.
- The article points to breaches and exposures that show how long-lived secrets can remain exploitable long after they are created or copied.
- Reducing risk means replacing shared secrets with workload identity where possible and tightening lifecycle ownership where secrets still exist.
Standards & Framework Alignment
This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.
OWASP Non-Human Identity Top 10 addresses the attack and risk surface, while NIST SP 800-53 Rev 5 and CIS Controls v8 set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| OWASP Non-Human Identity Top 10 | NHI-02 — Secret Leakage | The article centres on secrets copied into code, files, and CI/CD paths, which is secret leakage in practice. |
| NHI-07 — Long-Lived Secrets | Long-lived shared credentials are the core mechanism behind the sprawl problem described here. | |
| NHI-05 — Overprivileged NHI | The article notes that exposed secrets can unlock more access than a workload actually needs. | |
| Recommendation — Scan for exposed machine secrets and revoke any leaked credentials before they are reused. Replace long-lived machine secrets with short-lived credentials or workload identity wherever possible. Review machine credential scope and reduce permissions to the minimum required for each workload. | ||
| NIST SP 800-53 Rev 5 | IA-5 — Authenticator Management | IA-5 directly governs secret issuance, rotation, and revocation for machine authenticators. |
| Recommendation — Apply authenticator management to inventory, rotate, and retire machine credentials on a defined lifecycle. | ||
| CIS Controls v8 | CIS-5 — Account Management | The article is fundamentally about machine account and credential lifecycle control across systems. |
| Recommendation — Centralise account management so machine identities and their secrets are owned, tracked, and removed consistently. | ||
Key terms
- Secrets Sprawl: The uncontrolled proliferation of sensitive credentials, API keys, tokens, passwords, certificates, across codebases, cloud environments, CI/CD pipelines, and configuration files. In 2024, over 50 million leaked secrets were found on the dark web.
- Workload Identity: The identity assigned to a software workload, such as a containerised application, serverless function, or microservice, enabling it to authenticate to other services without storing static credentials.
- Shared Secret: Any credential or factor that can be known by more than one party and copied or reused, such as a password, OTP, or recovery code. Shared secrets are fragile because once exposed, they can often be replayed to bypass identity controls.
- Identity Blast Radius: The amount of damage a compromised identity can cause across systems, data, and infrastructure. In NHI environments, it is shaped by permissions, network reach, and administrative capability rather than by the credential alone. Reducing blast radius is a containment strategy that limits lateral movement and data exposure.
Deepen your knowledge
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Published by the NHIMG editorial team on June 24, 2026.
Updated on October 6, 2026.
NHI Mgmt Group, the independent authority on Non-Human Identity, IAM, and Agentic AI security. nhimg.org