In March 2025, a popular JavaScript utility library with 11 million weekly downloads went three months without a maintainer response. No bug fixes, no security patches, no issue triage. The sole maintainer had quietly stepped away -- no announcement, no handoff, no deprecation notice. They just stopped.
This is not unusual. It happens dozens of times a year across every package ecosystem. Most of the time, nobody notices until a critical vulnerability goes unpatched or a breaking change in a transitive dependency cascades through thousands of projects.
Maintainer succession is a supply chain problem, and we need to start treating it like one.
The Scale of the Problem
The numbers are stark. According to data we have aggregated across npm, PyPI, and Maven Central:
- 18% of packages with over 1 million downloads have a single maintainer
- 34% of those single-maintainer packages have had no commit activity in the past 12 months
- The median tenure of an active open source maintainer is 3.2 years before they significantly reduce their involvement
These are not marginal packages. They are the connective tissue of the modern software supply chain. Date parsing, string manipulation, HTTP utilities, compression libraries -- the unglamorous but essential infrastructure that everything else depends on.
When a maintainer leaves, one of several things happens:
- Graceful handoff -- the maintainer transfers ownership to a trusted successor. This is the best case and the rarest.
- Community fork -- someone creates a fork and the ecosystem gradually migrates. This works but creates confusion and fragmentation.
- Zombie maintenance -- someone gets commit access and makes minimal changes to keep things running. Quality degrades over time.
- Abandonment -- the package becomes unmaintained. Vulnerabilities accumulate. Eventually, it becomes a supply chain risk.
- Hostile takeover -- an attacker convinces the registry or the maintainer to transfer ownership, then publishes malicious updates. This is the worst case and it is more common than most people realize.
Why Traditional Approaches Fail
The open source community has tried several approaches to this problem. Most have not worked well at scale.
"Just contribute" -- the standard response when someone asks for a maintainer to do something is "open source, submit a PR." But most packages need someone to review PRs, manage releases, handle security reports, and make architectural decisions. You cannot crowdsource judgment.
Foundation sponsorship -- organizations like the Linux Foundation and Apache Foundation provide governance for some critical projects. But there are millions of packages and a few dozen foundations. The math does not work for the long tail.
Financial sponsorship -- GitHub Sponsors, Open Collective, and Tidelift have created funding mechanisms. But money alone does not solve succession. A burned-out maintainer with funding is still a burned-out maintainer. And many maintainers explicitly do not want their hobby to become a job.
Registry-level intervention -- npm, PyPI, and others have policies for transferring abandoned packages, but the processes are slow, contentious, and ripe for social engineering.
A Supply Chain Risk Framework for Maintainer Health
We need to treat maintainer health as a measurable supply chain risk factor, not a vague concern. Here is the framework we use at Safeguard.
Risk Indicators
Bus factor. How many people have meaningful commit access and release authority? A bus factor of 1 is a critical risk for any package in your dependency tree.
Activity patterns. Is the maintainer's activity consistent, declining, or absent? Sudden silence after years of activity is a strong warning signal.
Response latency. How long do security reports, critical bugs, and dependency updates take to get addressed? Increasing latency is an early indicator of maintainer fatigue.
Community health. Is there a contributor pipeline? Are PRs being reviewed? Are there co-maintainers being onboarded? A healthy project develops new contributors over time.
Financial sustainability. Is the project funded? If so, is the funding stable and sufficient? Funding does not guarantee health, but lack of funding for high-demand projects is a stressor.
Risk Scoring
We assign a maintainer risk score to each dependency:
- Low risk (1-3): Multiple active maintainers, regular releases, healthy contributor pipeline
- Medium risk (4-6): Small maintainer team (2-3), consistent but infrequent activity, limited contributor pipeline
- High risk (7-8): Single active maintainer, declining activity, no contributor onboarding
- Critical risk (9-10): No maintainer response in 6+ months, known unpatched vulnerabilities, no succession plan
What Organizations Should Do
For Your Own Projects
If your organization maintains open source projects that others depend on, you have a responsibility to plan for succession.
Document institutional knowledge. Release processes, architecture decisions, known issues, and security handling procedures should all be documented. If the current maintainer is hit by a bus tomorrow, can someone else make a release?
Cultivate co-maintainers. Actively invite and mentor contributors. Give trusted contributors commit access before you need to hand off the project. Building trust takes time -- start early.
Define a succession policy. Write down what happens if the current maintainer steps away. Who takes over? How is the decision made? Where is this documented?
Use multi-person controls for releases. Require at least two maintainers to approve releases, especially for packages with high download counts. This also mitigates account compromise risks.
For Your Dependencies
Inventory your critical dependencies. Use SBOM tooling to identify which packages in your supply chain are single-maintainer and high-risk.
Engage with critical projects. If your business depends on a package maintained by one person, contribute. Not just code -- documentation, testing, triage, and funding all help.
Have a fork-and-maintain plan. For your most critical dependencies, know where the source code is, know how to build it, and have a plan for maintaining a fork if the upstream goes dark. You do not need to execute this plan -- just having it ready changes your risk posture.
Monitor maintainer health metrics. Track the risk indicators described above for your top dependencies. Set alerts for sudden changes.
For the Ecosystem
Support foundation efforts. The Alpha-Omega project, the Open Source Security Foundation (OpenSSF), and similar initiatives are working on this problem at scale. They need funding and participation.
Advocate for registry improvements. Package registries should surface maintainer health information. Download counts and star counts tell you popularity, not sustainability.
Normalize succession planning. The open source community sometimes treats succession planning as defeatist -- as if planning for a maintainer's departure means you expect them to fail. It is the opposite. It is how you ensure their work outlasts their involvement.
How Safeguard.sh Helps
Safeguard.sh tracks maintainer health metrics for every dependency in your SBOM. Our platform flags single-maintainer packages, monitors activity trends, and scores maintainer risk alongside vulnerability and license risk. Policy gates can enforce minimum maintainer health standards for new dependencies, and our dashboards give you visibility into which parts of your supply chain are most vulnerable to maintainer abandonment. Supply chain security is not just about malware and vulnerabilities -- it is about the people who keep the software running.