CVE-2026-29771: Github.com/gravitl/netmaker Denial of Service Vulnerability

HIGH
Advisory Identifier: GHSA-rhr9-hgcm-x289
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CWE-404
Published
Advisory Summary

CVE-2026-29771 is a HIGH denial of service vulnerability (CWE-404: Improper Resource Shutdown or Release) affecting Github.com/gravitl/netmaker libraries in the Go ecosystem. The issue involves netmaker vulnerable to denial of service via server shutdown endpoint. Remediation is available by upgrading affected packages to version 1.2.0.

CVE-2026-29771 at a Glance

CVE Identifier CVE-2026-29771
GHSA Identifier GHSA-rhr9-hgcm-x289
Severity HIGH
CVSS v3.1 Base Score N/A
CWE Classification CWE-404: Improper Resource Shutdown or Release
Affected Product Github.com/gravitl/netmaker
Package Ecosystem Go
Published Date
Last Updated

How to Fix CVE-2026-29771

To remediate this vulnerability, upgrade all affected Github.com/gravitl/netmaker dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

github.com/gravitl/netmaker fixed: 1.2.0 
Upgrade github.com/gravitl/netmaker to 1.2.0
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for github.com/gravitl/netmaker

How to Check if You Are Affected

To determine whether your application is affected by CVE-2026-29771, inspect your project dependencies for Github.com/gravitl/netmaker:

inspect dependencies for github.com/gravitl/netmaker

Analyze the terminal output to locate any version of Github.com/gravitl/netmaker in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.2.0), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-404: Improper Resource Shutdown or Release, where the product does not release or incorrectly releases a resource before it is made available for re-use. In Github.com/gravitl/netmaker, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

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.

CVE-2026-29771 Affected Github.com/gravitl/netmaker Versions

1 component(s)
Fixed Versions:
1.2.0
Product / Package Ecosystem Affected Versions Fixed Version
github.com/gravitl/netmaker
golang/github.com/gravitl/netmaker
Go
< 1.2.0
1.2.0

References

GitHub Advisory / Wiki ADVISORY
https://github.com/gravitl/netmaker/security/advisories/GHSA-rhr9-hgcm-x289
NVD — CVE-2026-29771 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-29771
Github.com/gravitl/netmaker Source Repository REPOSITORY
https://github.com/gravitl/netmaker

Frequently Asked Questions

What is CVE-2026-29771?
CVE-2026-29771 is a security vulnerability in Github.com/gravitl/netmaker involving Netmaker Vulnerable to Denial of Service via Server Shutdown Endpoint under CWE-404: Improper Resource Shutdown or Release.
Which Github.com/gravitl/netmaker versions are affected?
Affected versions include releases prior to 1.2.0 across affected packages: github.com/gravitl/netmaker.
What version fixes CVE-2026-29771?
Upgrading to 1.2.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/gravitl/netmaker affected?
Yes, github.com/gravitl/netmaker is affected in releases prior to 1.2.0. Upgrade your dependency to 1.2.0 or later.
What CWE is associated with CVE-2026-29771?
CVE-2026-29771 is classified under CWE-404: Improper Resource Shutdown or Release (The product does not release or incorrectly releases a resource before it is made available for re-use.).
How can I check Go dependencies for CVE-2026-29771?
Run the dependency tree command: 'inspect dependencies for github.com/gravitl/netmaker'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-rhr9-hgcm-x289",
  "modified" : "2026-03-09T15:49:12Z",
  "published" : "2026-03-04T22:09:10Z",
  "aliases" : [ "CVE-2026-29771" ],
  "summary" : "Netmaker Vulnerable to Denial of Service via Server Shutdown Endpoint",
  "details" : "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.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "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"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/gravitl/netmaker"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.2.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/gravitl/netmaker/security/advisories/GHSA-rhr9-hgcm-x289"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-29771"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/gravitl/netmaker"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-404" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-03-04T22:09:10Z",
    "nvd_published_at" : "2026-03-07T16:15:54Z"
  }
}