# CVE-2026-29771: Netmaker: Denial of Service via Server Shutdown Endpoint

> An unauthenticated attacker can repeatedly shut down the Netmaker server via an exposed endpoint, causing a cyclic denial of service.

- **Severity:** High 8.7 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 7 Mar 2026
- **Updated:** 9 Mar 2026
- **Also known as:** GHSA-rhr9-hgcm-x289, GO-2026-4608

## What is CVE-2026-29771?

CVE-2026-29771 is a high-severity denial of service vulnerability in gravitl netmaker, published on 7 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Netmaker makes networks with WireGuard. Prior to version 1.2.0, the /api/server/shutdown endpoint allows termination of the Netmaker server process via syscall.SIGINT. This allows any user to repeatedly shut down the server, causing cyclic denial of service with approximately 3-second restart intervals. This issue has been patched in version 1.2.0.

Weakness: CWE-404 (Improper Resource Shutdown or Release)

## Which versions are affected by CVE-2026-29771?

3 open source packages ship an affected version, including github.com/gravitl/netmaker. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `github.com/gravitl/netmaker` | Go | All versions | 1.2.0 |
| `github.com/gravitl/netmaker` | Go | All versions | 1.2.0 |
| `github.com/gravitl/netmaker` | Go | All versions | 1.2.0 |

Products: Netmaker Netmaker.

## How do I fix CVE-2026-29771?

Upgrade github.com/gravitl/netmaker to 1.2.0 or later.

## Is CVE-2026-29771 being exploited?

There is no known exploitation of CVE-2026-29771 in the wild and no public exploit code.

## Other vulnerabilities in gravitl netmaker

- [CVE-2023-32079](https://insights.sbomify.com/CVE-2023-32079/): Netmaker Privilige Escalation Vulnerability (high 8.8)
- [CVE-2022-36110](https://insights.sbomify.com/CVE-2022-36110/): Netmaker vulnerable to Insufficient Granularity of Access Control (high 8.8)
- [CVE-2022-0664](https://insights.sbomify.com/CVE-2022-0664/): Use of Hard-coded Cryptographic Key in gravitl/netmaker (high 8.8)
- [CVE-2026-38651](https://insights.sbomify.com/CVE-2026-38651/): Netmaker does not verify JWT signatures for host tokens (high 8.2)
- [CVE-2023-32077](https://insights.sbomify.com/CVE-2023-32077/): Netmaker has Hardcoded DNS Secret Key (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-29771 and fix it if it is affected.

What it is: CVE-2026-29771 is a high-severity denial of service vulnerability in gravitl netmaker, published on 7 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-29771 in the wild and no public exploit code.

Affected packages and fixed versions:
- github.com/gravitl/netmaker (Go): affected all versions; fixed in 1.2.0
- github.com/gravitl/netmaker (Go): affected all versions; fixed in 1.2.0
- github.com/gravitl/netmaker (Go): affected all versions; fixed in 1.2.0

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-29771/ (Markdown: https://insights.sbomify.com/CVE-2026-29771/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-29771
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-29771
- OSV: https://osv.dev/vulnerability/CVE-2026-29771

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-29771/
Summaries are generated and may contain mistakes; the official description above is the record.