Runtime secret resolution means a platform stores a reference to a credential and fetches the live value only when a request is executed. This reduces persistence and can limit exposure, but only if the resolved secret is not cached, copied into logs, or written to disk.
Expanded Definition
Runtime secret resolution is a pattern for retrieving a live credential at execution time rather than embedding the value in application code, environment variables, or static configuration. It is most useful when a workload needs a short-lived token, certificate, or API key only for the exact request being processed. In NHI security, that design supports smaller persistence windows and cleaner rotation, but it does not by itself create strong security. The secret still becomes exposed if the application caches it too broadly, writes it to disk, or emits it to telemetry. Guidance varies across vendors on whether a fetched credential should be treated as a secret, a session artifact, or a transient identity token, so operational handling matters as much as retrieval. For a broader NHI control perspective, the OWASP Non-Human Identity Top 10 frames secret handling as a core risk area, while NHI Management Group shows how persistent credential exposure remains common across enterprises.
The most common misapplication is assuming runtime retrieval makes a secret “nonpersistent” even when the application copies it into logs, caches, or debug traces.
Examples and Use Cases
Implementing runtime secret resolution rigorously often introduces latency and operational dependency on the secret source, requiring organisations to weigh tighter exposure control against request-time availability and failure handling.
- A CI/CD job resolves a deployment token only when it starts, instead of storing the token in the pipeline definition. This reduces standing exposure and aligns with the risk patterns described in the Guide to the Secret Sprawl Challenge.
- An AI agent fetches a database credential just before running an approved tool action, then discards it after use. This is safer than leaving a long-lived secret in the agent runtime, especially where tool execution is autonomous and repeated.
- A service retrieves a short-lived certificate at request time from a secrets manager and uses it to establish mutual TLS with an upstream API. The pattern fits short-lived trust models better than static secret do.
- A production script resolves a cloud API key at execution time instead of reading it from a config file, then fails closed if the vault is unavailable. This is preferable to hard-coded credentials but still requires strict audit logging and no disk writes.
Why It Matters in NHI Security
Runtime secret resolution matters because NHI compromise often begins where secrets are easiest to copy, reuse, or exfiltrate. If the resolved value lands in logs, process memory snapshots, crash dumps, or temporary files, the pattern loses most of its protective value. It is especially relevant in environments with high secret sprawl, where NHI Management Group reports that 96% of organisations store secrets outside of secrets managers in vulnerable locations including code, config files, and CI/CD tools. That creates a strong incentive to move from static storage to runtime retrieval, but the control still has to be paired with cache limits, process isolation, rotation, and strict telemetry hygiene. The OWASP guidance and the 52 NHI Breaches Analysis both reflect the same operational lesson: exposure often persists after the initial compromise if secret handling is weak. Organisations typically encounter the operational cost of runtime secret resolution only after a secret leak or incident review, at which point the term becomes unavoidable to address.
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 | Secret handling and exposure reduction are core NHI risks in this area. |
| NIST CSF 2.0 | PR.AC-1 | Access to secrets should be limited to authorised workflows and systems. |
| NIST Zero Trust (SP 800-207) | SC-7 | Just-in-time secret use supports zero trust by reducing implicit trust duration. |
Restrict secret retrieval to approved runtimes and verify access paths regularly.
