CVE-2026-29771: Gravitl Netmaker denial of service via server shutdown endpoint

CVE-2026-29771 · Severity: medium · CVSS 6.5 · Published 2026-03-07

Netmaker, a platform used to manage virtual networks, contains a flaw that allows users to remotely shut down the central server. By repeatedly triggering this shutdown, an attacker can cause a continuous service outage, preventing legitimate users from accessing or managing their networks. This disruption can halt business operations that rely on these secure network connections.

Technologies: github.com/gravitl/netmaker (Go), Netmaker. Vendors: Go, Netmaker.

Quick answers

Is CVE-2026-29771 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-29771 being exploited in the wild.
How severe is CVE-2026-29771?
Medium severity, with a CVSS score of 6.5, published 7 March 2026.
Which products and versions are affected?
github.com/gravitl/netmaker (Go) SEMVER:introduced=0,fixed=1.2.0.
Is there a fix for CVE-2026-29771?
Yes. github.com/gravitl/netmaker (Go): upgrade to 1.2.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-29771 attacked?
It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-29771?
Check whether you run github.com/gravitl/netmaker (Go) or Netmaker at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • github.com/gravitl/netmaker (Go): upgrade to 1.2.0 or later
    go get github.com/gravitl/netmaker@v1.2.0

Technical details

A denial of service vulnerability exists in Netmaker's API due to an improper resource shutdown mechanism (CWE-404). The '/api/server/shutdown' endpoint is accessible to users and, when called, triggers a 'syscall.SIGINT' to terminate the server process. While the server may automatically restart, an attacker can repeatedly call this endpoint to create a cyclic denial of service with roughly 3-second intervals of downtime. The vulnerability is present in versions prior to 1.2.0 and has been addressed in the 1.2.0 release.

Affected products

  • Gravitl Netmaker < 1.2.0

Identifiers

  • CVE-2026-29771
  • GHSA-rhr9-hgcm-x289
  • GO-2026-4608

Timeline

  • 2026-03-04: advisory: GitHub Security Advisory published by vendor
  • 2026-03-07: disclosed: CVE published to NVD
  • 2026-03-07: patched: Fix released in version 1.2.0

References

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