How should teams govern shared credentials across the full identity lifecycle?

Why This Matters for Security Teams

Shared credentials become risky when they are treated as convenience objects instead of governed identities. A single password, token, or API key can be reused across multiple systems, passed between teams, and left behind after the original owner changes. That creates lifecycle drift: the credential still works, but no one can explain who should use it, who approved it, or when it should be removed. NHI Management Group’s Ultimate Guide to NHIs — Lifecycle Processes for Managing NHIs frames this as an identity governance problem, not a vault problem.

This matters because shared credentials often sit outside normal joiner-mover-leaver workflows. They are created for scripts, service accounts, integrations, or teams, then handed around informally. The result is weak ownership, unclear business justification, and delayed revocation when systems are retired or staff leave. Current guidance from the OWASP Non-Human Identity Top 10 and the NIST Cybersecurity Framework 2.0 points toward traceability, least privilege, and continuous review as the practical baseline. In practice, many security teams discover shared-credential sprawl only after offboarding, incident response, or an audit exposes accounts that were never truly owned.

How It Works in Practice

Teams should govern shared credentials as lifecycle-managed identities with explicit custody, not as static secrets stored in a vault. That starts with assigning each credential to a business owner, a technical owner, and a documented purpose. Provisioning should be tied to an authoritative event such as a system launch, approved integration request, or change ticket, while removal should be tied to retirement, service replacement, or access termination.

Operationally, the control set should include:

• Inventorying every shared credential and mapping it to the workload, team, or application that depends on it.
• Recording who approved issuance, who can request rotation, and what condition triggers revocation.
• Reviewing access history, group membership, and usage patterns together so dormant but still-valid credentials are not missed.
• Replacing broad sharing with scoped alternatives where possible, such as workload identity, per-service secrets, or token exchange.
• Rotating credentials on a schedule that reflects risk, change frequency, and exposure rather than calendar convenience alone.

NHIMG’s NHI Lifecycle Management Guide and Guide to the Secret Sprawl Challenge are useful references for linking secrets governance to inventory, ownership, and removal. The pattern aligns with the NIST SP 800-63 Digital Identity Guidelines in one important way: identity proofing is not enough if the credential lifecycle is unmanaged afterward. For shared credentials, current best practice is to couple vault controls with identity events and evidence of actual use, because unused credentials still represent standing access.

These controls tend to break down in legacy environments where one credential supports many scripts, cron jobs, or embedded integrations and no single team is able to absorb the migration cost.

Common Variations and Edge Cases

Tighter lifecycle control often increases operational overhead, requiring organisations to balance faster remediation against the inconvenience of replatforming brittle integrations. That tradeoff is especially visible in environments with vendor-managed systems, embedded service accounts, or cross-functional admin access where one credential supports multiple business processes.

There is no universal standard for how much sharing is acceptable, but current guidance suggests treating exception cases as temporary and reviewable. Shared break-glass accounts, for example, may be justified for continuity, yet they still need logging, periodic access review, and revocation criteria. Likewise, a credential used by a small automation cluster should not be governed the same way as a human-facing support account. The control objective changes with exposure: the more systems and people that rely on a secret, the more urgent it becomes to replace it with a less-shared identity model.

Where teams struggle most is in merging identity, secrets, and change management. The The 2025 State of NHIs and Secrets in Cybersecurity report notes that 91% of former employee tokens remain active after offboarding, which illustrates how quickly lifecycle failure becomes exposure. That is why the most reliable programs do not ask whether a shared credential exists; they ask whether its ownership, scope, and retirement path are still defensible today.

Related resources from NHI Mgmt Group

• How should security teams govern identity access across Entra and other platforms?
• How should security teams govern vendor access across the full lifecycle?
• How should security teams govern reusable identity credentials across blockchains?
• How should security teams manage access provisioning across the full identity lifecycle?