Long-lived tokens are dangerous because they turn a single compromise into broad publishing access across time and projects. If attackers steal one token from a repository, CI system, or maintainer machine, they can publish malicious packages until the token is revoked. Short-lived, per-run credentials sharply reduce that blast radius.
Why This Matters for Security Teams
Publishing tokens are not just another secret. In software supply chain, they often represent the ability to upload, overwrite, or trust a release artifact, which means compromise can propagate into downstream builds, dependency mirrors, and customer environments. That makes token lifetime a risk multiplier, especially when the same credential is reused across repositories, pipelines, or maintainer workflows. The control objective is simple: reduce standing access and make abuse expire quickly. That aligns closely with the identity-centric guidance in the OWASP Non-Human Identity Top 10 and the access governance expectations in the NIST Cybersecurity Framework 2.0.
The operational mistake is assuming a token is “low risk” because it only publishes packages. In practice, publishing is a trust function, not a narrow admin function. Once a token is exposed in logs, build output, a developer laptop, or a CI variable, it can often be used repeatedly without user interaction, MFA challenge, or obvious alerting. That is why long-lived tokens remain attractive to attackers: they are quiet, durable, and easy to automate against. In practice, many security teams encounter this only after a package integrity incident has already reached consumers, rather than through intentional token lifecycle review.
How It Works in Practice
Risk grows when a token outlives the job, system, or approval it was meant to support. A token stored in a package registry, CI secret store, or environment variable may be valid for weeks or months, while the environment that created it changes many times. That creates a mismatch between trust and reality. A good publishing model treats each release as a separate, bounded identity event: the token is issued for a single run, scoped to a specific package or namespace, and revoked immediately after use.
Practitioners usually reduce exposure with a layered approach:
- Use short-lived credentials where the registry supports them, ideally issued just in time for a specific pipeline run.
- Scope publishing rights to the narrowest package, repository, or tenant boundary available.
- Store secrets in a dedicated secrets manager rather than code, local files, or shared CI variables.
- Rotate or revoke on schedule, and immediately after maintainer changes, pipeline changes, or suspected leakage.
- Monitor for unusual publishing frequency, geography, time-of-day patterns, and failed authentication around release windows.
NIST control guidance on access and secret management is useful here, especially the expectation to limit privileged access and protect authenticators under NIST SP 800-53 Rev 5 Security and Privacy Controls. The practical point is that a publishing token should behave like a disposable capability, not a reusable identity. These controls tend to break down in legacy release processes where human maintainers manually reuse the same token across multiple registries because automation, ownership, or registry features are incomplete.
Common Variations and Edge Cases
Tighter token controls often increase release friction, requiring organisations to balance developer convenience against supply chain resilience. That tradeoff is real, especially for open source maintainers, small teams, and multi-registry publishing flows where automation support is uneven.
There is no universal standard for this yet, but current guidance suggests that the riskiest pattern is a long-lived token with broad write scope and no contextual checks. Some ecosystems now support OIDC-based federation or ephemeral release credentials, while others still rely on personal access tokens or registry tokens that are harder to constrain. Where short-lived issuance is unavailable, the next best step is to isolate tokens per package, per environment, and per publisher account.
Edge cases matter. A token used only for internal testing can still become high impact if it is accidentally granted production publish rights. Shared maintainer credentials are especially dangerous because one compromise affects multiple packages and teams. Emergency publishing also needs pre-planning: if a build fails and operators fall back to a long-lived token “just this once,” that exception often becomes the default. The safest pattern is to separate human approval from machine publishing and to keep the machine identity narrowly bound to the release workflow.
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, NIST AI RMF and NIST SP 800-53 Rev 5 set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| OWASP Non-Human Identity Top 10 | Secret lifecycle and workload identity governance | Publishing tokens are non-human identities that must be scoped and rotated. |
| NIST CSF 2.0 | PR.AC | Access control and credential lifecycle reduce abuse of stolen publishing tokens. |
| NIST AI RMF | AI-assisted release automation still needs governance for identity and secret exposure. | |
| NIST SP 800-53 Rev 5 | IA-5 | Authenticator management covers token protection, rotation, and revocation. |
Treat each publishing token as a governed machine identity with least privilege and planned expiry.
Related resources from NHI Mgmt Group
- Why do compromised non-human identities and source-control credentials create outsized risk in software supply chains?
- Why do unsigned or tampered artifacts create outsized risk in modern software supply chains?
- Why do long-lived Kubernetes tokens create more risk than short-lived ones?
- Why do service accounts and API tokens create more risk when they are long-lived?
