Because duplicated credentials and inconsistent storage create multiple exposure points, which makes revocation slower and accountability weaker. When a secret appears in code, chat, and ticketing systems at the same time, the program is no longer managing one access path. It is managing several potential compromise paths with different owners and response times.
Why This Matters for Security Teams
Secrets spread across code repos, chat tools, ticketing systems, and shared documents turn one identity problem into many operational problems. Every additional copy expands the exposure surface, delays revocation, and weakens confidence in who can still use the credential. For NHIs, that is especially dangerous because the same token or key often powers automation, deployment, and service-to-service access at machine speed.
The issue is not just leakage. It is also coordination failure. Teams often discover one copy, rotate it in one place, and assume the risk is closed while older copies remain active elsewhere. That is why NHI governance guidance from NHI Management Group consistently treats secret sprawl as a control failure, not a housekeeping issue, and why incidents described in the Guide to the Secret Sprawl Challenge map so directly to real-world compromise paths. Industry research from the OWASP Non-Human Identity Top 10 reinforces that duplicated and poorly governed secrets are a recurring failure mode, not an edge case.
In practice, many security teams encounter the breach after the secret has already been copied into multiple systems, rather than through intentional lifecycle management.
How It Works in Practice
Operational risk rises because each storage location creates a separate lifecycle, owner, audit trail, and response path. A token in a vault may be rotated promptly, but the same token cached in a pipeline variable, pasted into a Jira ticket, or embedded in application code can remain usable long after the primary record is fixed. The organisation now has multiple compromise paths, each with different visibility and different revocation timing.
Current best practice is to treat secrets as a distributed control problem. That means inventorying where the secret exists, mapping where it is referenced, and removing every duplicate, not just the source copy. It also means using short-lived credentials where possible, enforcing just-in-time issuance for privileged workflows, and binding access to the workload or agent rather than the person who happened to paste the secret. The 2025 State of NHIs and Secrets in Cybersecurity notes that 62% of secrets are duplicated across multiple locations and 44% of NHI tokens are exposed in systems like Teams, Jira, Confluence, and code commits, which shows how quickly sprawl becomes an exposure event.
- Use a single source of truth for issuance, then revoke every known copy when a secret changes.
- Prefer ephemeral tokens and short TTLs so exposure windows are measured in minutes or hours, not months.
- Automate secret discovery in repositories, tickets, chat, and build logs before an attacker does.
- Apply workload identity and policy enforcement at request time, rather than trusting where the secret was stored.
Frameworks such as the NIST Cybersecurity Framework 2.0 support this by pushing organisations toward governed asset visibility and response discipline, but they do not remove the need for explicit secret hygiene. These controls tend to break down when legacy applications require static credentials because rotation and duplicate removal become partially manual.
Common Variations and Edge Cases
Tighter secret control often increases operational overhead, requiring organisations to balance faster containment against deployment friction. That tradeoff is real in environments with fragile legacy integrations, vendor connectors, or long-lived batch jobs that cannot yet use workload identity. In those cases, teams may need to phase controls in rather than force an immediate cutover.
There is no universal standard for handling every duplicate path yet, especially when secrets appear in transient artifacts such as build logs, browser sessions, or incident notes. Current guidance suggests prioritising the highest blast-radius systems first: production pipelines, cloud admin paths, and shared automation accounts. Secrets embedded in source control should be treated as compromised by default, even if the repository is private, because access patterns are hard to prove retroactively.
For these edge cases, the practical goal is not perfect elimination on day one. It is reducing the number of places a secret can live, shortening its usable life, and ensuring revocation reaches all copies fast enough to matter. The 52 NHI Breaches Analysis and Top 10 NHI Issues both show that organisations usually fail at the handoff between discovery and enforcement, not at the first detection event.
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 AI RMF set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| OWASP Non-Human Identity Top 10 | NHI-03 | Secret sprawl increases exposure and weakens rotation discipline. |
| NIST CSF 2.0 | PR.AC-1 | Distributed secrets create uncontrolled access paths across systems. |
| NIST AI RMF | GOVERN | Automated environments need accountable governance for secret handling. |
Map each secret location to an owner and enforce least privilege everywhere it appears.
