CVE-2026-38651: Authentication Bypass vulnerability exists in Netmaker versions prior to 1.5.0

Q: How do I fix CVE-2026-38651?

netmaker: upgrade to 1.5.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-38651 being exploited?

CVE-2026-38651 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-38651 affect?

CVE-2026-38651 affects netmaker. Severity is high (CVSS 8.2). Authentication Bypass vulnerability exists in Netmaker versions prior to 1.5.0. The VerifyHostToken function in logic/jwts.go fails to validate the JWT signature when verifying host tokens. An attacker can forge a JWT signed with any arbitr

Q: How urgent is CVE-2026-38651?

Priority 44/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

HIGH 8.2REMOTEUPGRADE

CVE-2026-38651 is a high-severity flaw (CVSS 8.2) affecting netmaker. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Authentication Bypass vulnerability exists in Netmaker versions prior to 1.5.0. The VerifyHostToken function in logic/jwts.go fails to validate the JWT signature when verifying host tokens. An attacker can forge a JWT signed with any arbitrary key and use it to impersonate any host in the network, gaining access to sensitive information

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	8.2 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 78%)
CISA exploited list	No
Weakness	CWE-347
Published	2026-04-28
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: netmaker

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-28 16:16 UTCPublished CVE record published
2026-06-17 10:41 UTCUpdated Record last modified

netmaker netmaker UPGRADE

Affected: < 1.5.0

Fixed in: 1.5.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy netmaker || rpm -q netmaker || netmaker --version

2. UPGRADE to 1.5.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade netmaker

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade netmaker

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-38651?

netmaker: upgrade to 1.5.0. Exact commands for each OS are on this page.

Is CVE-2026-38651 being exploited?

CVE-2026-38651 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-38651 affect?

CVE-2026-38651 affects netmaker. Severity is high (CVSS 8.2). Authentication Bypass vulnerability exists in Netmaker versions prior to 1.5.0. The VerifyHostToken function in logic/jwts.go fails to validate the JWT signature when verifying host tokens. An attacker can forge a JWT signed with any arbitr

How urgent is CVE-2026-38651?

Priority 44/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

References

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