Because revoking one credential does not remove every place it was copied. If the same secret appears in repositories, pipelines, tickets, and application configs, an attacker only needs one surviving copy to regain access after the primary secret is changed.
Why This Matters for Security Teams
secrets sprawl turns a single credential issue into a recovery problem. When the same API key, token, or certificate is copied into source code, CI/CD variables, tickets, chat tools, and application configs, revocation becomes incomplete by default. The real risk is not just exposure, but persistence: one forgotten copy can preserve access long after a “rotation” event. NHIMG research on the Guide to the Secret Sprawl Challenge shows why distribution across tools is the core problem, not just storage in one vault.
This is also why current guidance from OWASP Non-Human Identity Top 10 treats unmanaged secrets as a primary NHI failure mode. GitGuardian’s State of Secrets Sprawl 2025 reports that 4.6% of public GitHub repositories contain at least one hardcoded secret, which illustrates how routine leakage has become in modern delivery pipelines. In practice, many security teams discover the surviving copy only after an attacker has already used it to re-enter the environment.
How It Works in Practice
Duplicate credentials increase breach risk because they break the normal security assumption that one secret maps to one control point. If a token is embedded in code, echoed into logs, copied into a ticket, and reused in another environment, each location becomes a separate exposure path. Rotation then becomes a scavenger hunt rather than a control. The effective blast radius is the full set of copies, not the original issuer.
Practical control starts with inventory, because you cannot revoke what you cannot find. Teams usually pair central secrets management with detection and blocking in repositories, build systems, collaboration tools, and runtime environments. The point is to reduce both the number of secret instances and the lifetime of each instance. NHIMG’s 52 NHI Breaches Analysis repeatedly shows that credential exposure becomes harder to contain when the same access material is distributed across too many systems.
- Use a single source of truth for secret issuance and rotation.
- Enforce short TTLs so exposed credentials expire quickly.
- Scan code, CI logs, tickets, and chat for duplicate copies.
- Replace embedded secrets with workload identity or federated auth where possible.
- Require automated revocation workflows so a leak triggers cleanup everywhere.
These controls align with the NIST Cybersecurity Framework 2.0 emphasis on asset visibility and response discipline, and they are reinforced by NIST SP 800-53 Rev 5 Security and Privacy Controls around access control, audit, and system integrity. These controls tend to break down when legacy applications hardcode secrets into images or when multiple teams can copy credentials into unmanaged collaboration tools because the revocation path is no longer technically complete.
Common Variations and Edge Cases
Tighter secret control often increases delivery friction, requiring organisations to balance developer speed against exposure reduction. That tradeoff is real, especially in environments with many short-lived pipelines, third-party integrations, or shared test data. Best practice is evolving here: there is no universal standard for when every secret must be eliminated versus when a tightly managed secret is still acceptable.
High-risk cases include shared service accounts, long-lived API keys for vendors that do not support federation, and emergency “break glass” credentials. Those exceptions should be rare, separately governed, and monitored more aggressively than routine operational secrets. Where possible, shift to ephemeral credentials and workload-bound identity so access is issued per task instead of copied across systems. That is the direction reflected in Ultimate Guide to NHIs — Static vs Dynamic Secrets and in the broader NHI guidance from NIST and OWASP.
Controls also differ by environment. Container builds, IaC templates, SaaS collaboration spaces, and mobile apps each create distinct duplication paths, and a scanner tuned only for repositories will miss the rest. The practical goal is not perfect elimination overnight, but reducing the number of copies so one compromise does not become repeated compromise across the stack.
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 and CSA MAESTRO address the attack and risk surface, while NIST CSF 2.0 and NIST AI RMF set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| OWASP Non-Human Identity Top 10 | NHI-01 | Secrets sprawl is a core non-human identity exposure and lifecycle problem. |
| CSA MAESTRO | IAM-02 | Agent and workload access should rely on governed identity, not shared secrets. |
| NIST CSF 2.0 | PR.AC-1 | Access control weakens when the same secret is duplicated across systems. |
| NIST AI RMF | GOVERN | Governance must account for operational risk from duplicated machine credentials. |
Assign ownership for secret inventory, rotation, and incident response across all environments.
Related resources from NHI Mgmt Group
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Reviewed and updated by the NHIMG editorial team on August 2, 2026.
NHI Mgmt Group — the #1 independent authority on Non-Human Identity, IAM, and Agentic AI security. nhimg.org
