They matter because they create invisible, durable access that may outlive the people or systems that created it. When ownership, age, and usage are unclear, the organisation cannot prove who can still act, which turns a governance problem into a breach and audit problem at the same time.
Why This Matters for Security Teams
Stale credentials and unmanaged service-account keys matter because they create access that is durable, difficult to attribute, and easy to forget. In cloud environments, that combination defeats normal governance routines: ownership reviews miss orphaned keys, rotation slips behind operational urgency, and access logs no longer map cleanly to a current business need. Current guidance from the OWASP Non-Human Identity Top 10 treats this as a core NHI risk, not a housekeeping issue.
NHIMG research shows the problem is already widespread: 88.5% of organisations say non-human IAM lags behind human IAM, and only 19.6% express strong confidence in securing workload identities, according to the 2024 Non-Human Identity Security Report from Aembit. That gap matters because cloud service account often outlive teams, applications, and even the original security assumptions that created them. Once a key becomes invisible to inventory and review processes, it becomes an enduring path for lateral movement and privilege abuse. In practice, many security teams encounter credential drift only after an audit failure or an incident has already exposed the gap.
How It Works in Practice
The practical risk starts with how service accounts are used in cloud platforms. A single key may be embedded in scripts, CI/CD pipelines, automation jobs, containers, or infrastructure-as-code tooling. If it is long-lived, copied across environments, or never tied to an owner, it becomes a permanent credential even when the workload changes. Best practice is to treat every non-human identity as a governed lifecycle object, not a static secret, as described in NHIMG’s Ultimate Guide to NHIs -- Lifecycle Processes for Managing NHIs and Ultimate Guide to NHIs -- Static vs Dynamic Secrets.
Operationally, the control pattern is straightforward:
- Inventory every service-account key, token, and certificate, then assign an owner and expiry date.
- Replace static credentials with short-lived, just-in-time issuance wherever the workload supports it.
- Use workload identity and federation so systems prove who they are without hard-coded secrets.
- Rotate or revoke keys on schedule, after role changes, and immediately after deployment replacement.
- Alert on inactive credentials, unusual geographies, and keys that have not been used within an expected window.
The intent is not only to reduce secret sprawl but also to make access provable at the moment of use. That aligns with broader cloud identity guidance in the NIST Cybersecurity Framework 2.0, which emphasises governance, access control, and continuous risk management. These controls tend to break down in legacy automation, shared admin accounts, and multi-cloud estates where the same credential has been copied into too many systems to rotate safely.
Common Variations and Edge Cases
Tighter credential control often increases operational overhead, so organisations must balance security gain against deployment friction. Some environments cannot eliminate long-lived keys immediately because legacy applications, third-party integrations, or cross-account automation still depend on them. In those cases, current guidance suggests reducing blast radius first: scope permissions narrowly, shorten TTLs where possible, and enforce monitoring and revocation triggers before pursuing full migration.
There is no universal standard for this yet, especially across hybrid cloud and vendor-managed services. Some teams can move to federated identity quickly, while others must keep a small number of exception-based keys under explicit compensating controls. NHIMG’s Guide to the Secret Sprawl Challenge and Top 10 NHI Issues both reflect the same operational reality: unmanaged credentials usually persist because ownership and rotation responsibilities are split across platform, app, and security teams. The right question is not whether every key can disappear overnight, but whether any remaining key is visible, bounded, and revocable on demand.
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 address the attack and risk surface, while NIST CSF 2.0 and NIST CSF 2.0 set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| OWASP Non-Human Identity Top 10 | NHI-03 | Addresses stale and overlong non-human credentials directly. |
| NIST CSF 2.0 | PR.AC-1 | Maps to managing access and limiting who or what can use credentials. |
| NIST CSF 2.0 | GV.RM-1 | Supports continuous risk decisions for unmanaged secrets and cloud drift. |
Inventory service-account keys and rotate or revoke any credential that outlives its workload.
Related resources from NHI Mgmt Group
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Reviewed and updated by the NHIMG editorial team on June 23, 2026.
NHI Mgmt Group — the #1 independent authority on Non-Human Identity, IAM, and Agentic AI security. nhimg.org
