How should organisations reduce risk from long-lived non-human credentials?

Start by inventorying every credential that a workload, service account, or automated pipeline uses, then rank them by privilege and exposure. Replace the highest-risk credentials with short-lived, centrally issued access paths first. Rotation alone is not enough if the secret still exists in code or multiple environments. The goal is to shrink the number of persistent trust points.

Why This Matters for Security Teams

Long-lived non-human credentials turn normal automation into persistent access, which is exactly what attackers look for when they move from a single compromise to lateral abuse. The risk is not just theft of a secret, but the time window it opens across pipelines, cloud APIs, and service accounts. Current guidance suggests that reducing standing exposure matters more than simply changing passwords on a schedule. NHIMG research on the Guide to the Secret Sprawl Challenge shows why inventory first, then shrink trust points. External frameworks such as the OWASP Non-Human Identity Top 10 and NIST Cybersecurity Framework 2.0 both point toward least privilege, lifecycle control, and continuous monitoring as the practical baseline.

When a secret is embedded in code, mirrored across environments, or stored for convenience in CI/CD, rotation can become a paperwork exercise that leaves the real exposure intact. In practice, many security teams encounter credential abuse only after a build server, bot account, or automation token has already been used to reach systems it should never have touched.

How It Works in Practice

The most effective way to reduce risk is to replace persistent secrets with short-lived, centrally issued access paths. That means treating the secret as a temporary delivery mechanism, not the identity itself. For workloads, the preferred pattern is workload identity backed by cryptographic proof, then Just-in-Time access only when a task requires it. This is where the Ultimate Guide to NHIs — Static vs Dynamic Secrets is useful: dynamic secrets reduce the blast radius because the credential expires before an attacker can reliably reuse it.

A practical rollout usually follows four steps:

• Inventory every workload, pipeline, service account, and API key, then rank them by privilege, lifespan, and exposure.
• Move the most privileged systems first to centrally brokered access with short TTLs and automatic revocation.
• Replace static secrets in code, config files, and build variables with ephemeral tokens issued at request time.
• Use policy checks at issuance time so the secret is only valid for the intended workload, environment, and action.

That is especially important in CI/CD, where a token may be valid only for a build step or deployment window. The CI/CD pipeline exploitation case study and Reviewdog GitHub Action supply chain attack both illustrate how fast secrets can be harvested once they are exposed in automation. NIST identity guidance also supports short-lived, verifiable credentials rather than shared long-term access, and the NIST SP 800-63 Digital Identity Guidelines reinforce the importance of strong assertion and authentication lifecycle discipline.

These controls tend to break down when legacy systems require shared service credentials, because those environments often cannot consume federated identity or ephemeral token flows without redesign.

Common Variations and Edge Cases

Tighter secret controls often increase operational overhead, requiring organisations to balance stronger containment against pipeline complexity and incident response friction. That tradeoff is real, especially where build tooling, third-party integrations, or vendor-managed platforms still expect a static key. Best practice is evolving, and there is no universal standard for this yet, so the control design should match the system’s exposure profile rather than force one pattern everywhere.

One common exception is break-glass or emergency access. Those credentials may need to remain available, but they should be isolated, heavily monitored, and excluded from routine automation. Another edge case is agentic or autonomous software, where the workload does not follow a fixed path. In those environments, static role-based access often fails because the agent can chain tools and expand actions dynamically. For that reason, ephemeral access should be paired with real-time policy evaluation and context-aware authorisation, not just shorter passwords.

NHIMG incident analysis on the MongoBleed breach and Shai Hulud npm malware campaign shows how exposed secrets tend to reappear in places teams do not expect, including developer tooling and package ecosystems. That is why rotation alone is insufficient if the same credential still exists in repositories, snapshots, or multiple runtime copies.

In practice, the safest target is zero standing privilege for non-human access, with short-lived issuance, narrow scopes, and continuous revocation as the default rather than the exception.

Related resources from NHI Mgmt Group

• How can organisations reduce the risk of stale API keys and machine tokens?
• How do short-lived credentials change non-human identity risk?
• How can organisations reduce risk from long-lived AI agent access?
• When does secrets rotation actually reduce NHI risk?