How should financial services teams govern shared credentials across human and AI access paths?

Why This Matters for Security Teams

Shared credentials are already difficult to govern in financial services because they blur accountability, weaken offboarding, and make audit evidence harder to trust. Once the same password or token is used by both people and automation, the organisation loses a clean answer to who performed the action and whether the access was still appropriate at the time. That is a direct governance problem, not just an access hygiene issue.

The risk is amplified for financial workloads because privileged access often touches customer data, payments, trading systems, or treasury operations. Guidance from the OWASP Non-Human Identity Top 10 and NIST’s control baselines both point toward limiting standing access and preserving traceability, while NHIMG research shows how credential sprawl persists in real environments. In the Secret Sprawl Challenge, that sprawl is not theoretical: it becomes the path attackers use to reach higher-value systems.

In practice, many security teams discover the weakness only after a service account is overused, an employee leaves, or an AI workflow reuses a credential outside its intended scope.

How It Works in Practice

The strongest pattern is to treat shared credentials as a transition state, not a permanent operating model. Financial services teams should assign a clear owner, restrict where the credential can be used, and move both human and AI access paths toward named identities, delegated authorization, or short-lived secrets. The governance question is not whether a shared credential exists, but whether its use is narrowly approved, fully logged, and time-bound.

For humans, that usually means pairing the credential with PAM, approval workflow, and periodic recertification. For AI agents or automated jobs, best practice is evolving toward workload identity, runtime authorization, and ephemeral access. Instead of handing an agent a reusable secret, the system should issue a just-in-time credential for a specific task and revoke it when the task ends. That approach aligns with the operational logic described in Ultimate Guide to NHIs and Static vs Dynamic Secrets.

• Centralize ownership in one system of record so every credential has a named steward.
• Separate human approval paths from machine access paths, even if they touch the same backend.
• Use short TTLs, rotation, and revocation hooks for shared secrets that cannot yet be eliminated.
• Log request context, ticket reference, workload identity, and downstream action for every use.
• Review exceptions frequently, especially for break-glass accounts and batch automation.

When teams need a control baseline, NIST Cybersecurity Framework 2.0 and NIST SP 800-53 Rev. 5 support the same practical outcome: reduce unnecessary access, preserve accountability, and make credential misuse detectable. These controls tend to break down when legacy core banking systems require a single shared integration account and cannot emit task-level identity telemetry.

Common Variations and Edge Cases

Tighter credential governance often increases operational overhead, so financial institutions have to balance auditability against support burden and legacy compatibility. That tradeoff becomes visible fastest in batch processing, vendor-managed integrations, and disaster recovery accounts where shared access is still common.

There is no universal standard for eliminating every shared credential immediately. Current guidance suggests prioritising the most sensitive paths first: payment rails, customer data stores, admin consoles, and any workload that can trigger fund movement or external communication. Where shared access cannot yet be removed, the control objective should be containment, not convenience. That means strong logging, narrow time windows, and documented justification for every exception.

The risk profile changes again when an AI assistant can trigger the same credential as a human user. In those cases, one approval record is not enough unless it also identifies the acting identity, the runtime context, and whether the action was initiated directly or through an agent. NHIMG’s 52 NHI Breaches Analysis and the 2024 Non-Human Identity Security Report both reinforce that maturity gaps remain high, especially where organisations still rely on static credentials instead of dynamic controls.

Related resources from NHI Mgmt Group

• How should security teams govern non-human identities that have persistent access?
• How should security teams govern API keys used for generative AI access?
• How should security teams govern access across human, NHI, and AI identities?
• How should security teams govern identity fabrics across human, machine, and AI access?