Runtime secret retrieval is the practice of fetching credentials from a vault or controlled service only when they are needed. It reduces secret exposure in repositories and configs, but it only works when the retrieval path is scoped, logged, and tied to a specific workload or agent.
Expanded Definition
Runtime secret retrieval is most useful when a workload or agent must obtain a secret only at the moment of execution, rather than carrying a long-lived copy in code, images, or configuration. In NHI security, that distinction matters because the retrieval event becomes part of the identity control plane: the caller, the vault, the scope, and the audit trail all need to line up. The approach is closely related to dynamic secret issuance, but no single standard governs this yet, and usage in the industry is still evolving. Some teams use it to mean pull-on-demand access to a static secret, while others reserve it for ephemeral credentials that are minted and returned with a short lease. For a practical reference point, the OWASP Non-Human Identity Top 10 treats secret handling as a core failure mode when machine identities are not governed as first-class identities. NHI Management Group also documents how secret sprawl persists when organisations do not centralise secret handling, as described in the Guide to the Secret Sprawl Challenge. The most common misapplication is treating runtime retrieval as sufficient by itself, which occurs when teams fetch secrets at startup but still cache them broadly or reuse them across unrelated jobs.
Examples and Use Cases
Implementing runtime secret retrieval rigorously often introduces latency and dependency on vault availability, requiring organisations to weigh reduced secret exposure against tighter runtime coupling.
- A CI/CD job requests a database token only when a deployment step starts, then discards it after the job completes.
- An AI agent retrieves an API key for a single tool invocation, with scope limited to one action and one workspace.
- A service account fetches a signing certificate from a controlled service during container startup, instead of reading a baked-in file.
- A rotation workflow uses retrieval time to ensure the secret returned is current, not a stale copy lingering in a config store.
- A security team investigates a leak using Reviewdog GitHub Action supply chain attack patterns alongside the 52 NHI Breaches Analysis to understand how retrieval and exposure can diverge when tools cache credentials unexpectedly.
Runtime retrieval is often paired with short-lived access patterns described in Ultimate Guide to NHIs — Static vs Dynamic Secrets, but the retrieval mechanism still needs workload-bound authorization. In practice, the secret should be delivered only after the caller proves identity and purpose, not merely because a process knows where the vault is.
Why It Matters in NHI Security
Runtime secret retrieval matters because secrets are often the easiest path from a compromised workload to broader environment access. When retrieval is not tightly scoped, attackers can turn a single execution context into repeated access, especially when service accounts, API keys, or certificates are cached beyond their intended use. NHI Management Group notes that 96% of organisations store secrets outside of secrets managers in vulnerable locations including code, config files, and CI/CD tools, which shows how often retrieval is bypassed entirely. That is why runtime retrieval should be designed as a control, not just a convenience. It supports least privilege, limits blast radius, and improves revocation when the underlying workload is compromised. It also fits the broader governance direction of the OWASP Non-Human Identity Top 10, where secret exposure and over-permissioned machine identities are treated as recurring root causes. Organisations typically encounter the operational need for runtime secret retrieval only after a credential leak, at which point secret access becomes unavoidable to redesign.
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 Zero Trust (SP 800-207) set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| OWASP Non-Human Identity Top 10 | NHI-02 | Covers secret handling failures that runtime retrieval is meant to reduce. |
| NIST CSF 2.0 | PR.AC-4 | Least-privilege access to secrets supports controlled authorization for machine identities. |
| NIST Zero Trust (SP 800-207) | PA, PE | Zero trust requires continuous verification before a workload receives secrets. |
Limit secret retrieval permissions to the exact workload, time, and use case required.
Related resources from NHI Mgmt Group
Deepen Your Knowledge
Reviewed and updated by the NHIMG editorial team on June 7, 2026.
NHI Mgmt Group — the #1 independent authority on Non-Human Identity, IAM, and Agentic AI security. nhimg.org
