Start with complete inventory, then tie each credential to an owner, an expiry policy, and a rotation schedule. From there, enforce offboarding revocation and continuous review so that stale access does not accumulate between scheduled cleanups.
Why This Matters for Security Teams
Orphaned service accounts and stale tokens are not just cleanup issues. They are standing access paths that often survive long after the original project, employee, or integration has changed. The problem is especially dangerous when credentials are duplicated across tickets, chat, and code, because revocation becomes incomplete and delayed. In the 2025 State of NHIs and Secrets in Cybersecurity, Entro Security reported that 91% of former employee tokens remain active after offboarding, which shows how easily access outlives ownership. Current guidance from NIST Cybersecurity Framework 2.0 reinforces the need to manage identity lifecycle, access review, and continuous protection rather than relying on periodic cleanups alone. Similar failures are visible in incidents like the Salesloft OAuth token breach, where a live token became an active intrusion path instead of a temporary credential.
Security teams often assume service accounts are harmless because they are non-interactive, but that assumption breaks down once automation, SaaS integrations, and delegated admin tools start multiplying access. In practice, many security teams encounter stale tokens only after a breach review has already shown that the token was still valid.
How It Works in Practice
The practical fix is to make every NHI discoverable, owned, and time-bound. Start by inventorying service accounts, API keys, OAuth grants, certificates, and automation tokens across code, vaults, ticketing systems, and chat. Then assign a human owner, a business purpose, and an expiry or rotation policy for each one. If a credential cannot be tied to a current owner, treat it as a decommissioning candidate.
For day-to-day operations, use lifecycle controls that separate issuance from persistence. Best practice is to rotate secrets on a defined schedule, revoke them automatically when a workload is retired, and remove access at offboarding without waiting for the next quarterly review. This is consistent with the broader lessons in the Guide to the Secret Sprawl Challenge and the 2025 State of NHIs and Secrets in Cybersecurity, which show how exposed and duplicated secrets persist when ownership is weak. NIST also frames this as a continuous governance task in NIST Cybersecurity Framework 2.0, especially around asset visibility, access management, and recovery.
- Tag each service account with owner, system, and purpose so review is fast and unambiguous.
- Set short TTLs where the workload can tolerate it, and require renewal rather than indefinite validity.
- Revoke tokens immediately on termination, application retirement, or vendor relationship changes.
- Scan for tokens stored in tickets, docs, repos, and chat, not just in vaults.
- Alert on unused but valid credentials so dormant access can be removed before it is abused.
These controls tend to break down when credentials are shared across multiple applications or when teams have no authoritative inventory, because revocation of one dependency can unintentionally disrupt other hidden consumers.
Common Variations and Edge Cases
Tighter rotation and shorter TTLs often increase operational overhead, requiring organisations to balance reduced exposure against application stability and support burden. That tradeoff is real in legacy systems, vendor-managed integrations, and batch jobs that were built around static credentials. Current guidance suggests using exception handling, but there is no universal standard for this yet: the goal is to constrain exceptions, not normalise them. Where rotation is hard, compensating controls matter more, including scoped permissions, strong audit logging, and explicit decommission dates.
Some environments need extra care because service accounts are embedded in CI/CD runners, infrastructure automation, or third-party SaaS connectors. The Entro Security research shows that 44% of NHI tokens are exposed in the wild, and that context matters because a token copied into a Jira ticket or Confluence page is already outside the intended control plane. Incidents such as the Dropbox Sign breach and the Cisco Active Directory credentials breach show how exposed credentials can persist beyond the original system boundary. The right response is not only rotation, but also aggressive cleanup of duplicates, firm ownership, and deprovisioning checks that verify the token is actually dead.
For highly regulated or business-critical systems, combine periodic review with event-driven revocation, because scheduled cleanups alone are too slow for fast-moving access paths.
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 | Covers NHI lifecycle, rotation, and revocation gaps that create orphaned access. |
| NIST CSF 2.0 | PR.AC-1 | Addresses identity and access lifecycle management for service accounts and tokens. |
| NIST CSF 2.0 | PR.AC-4 | Supports least privilege and access restriction for credentials that should not remain standing. |
Assign ownership, enforce TTLs, and automate rotation and revocation for every non-human credential.
Related resources from NHI Mgmt Group
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Reviewed and updated by the NHIMG editorial team on May 16, 2026.
NHI Mgmt Group — the #1 independent authority on Non-Human Identity, IAM, and Agentic AI security. nhimg.org
