🛡️ CVE-2026-38651 — netmaker

🔴 CVSS 9.5 — Critical ✅ No Known Exploit CWE-347 NVD
9.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Netmaker does not verify JWT signatures for host tokens

Netmaker by Gravitl is an open-source WireGuard-based networking platform for creating and managing virtual overlay networks. The VerifyHostToken function in logic/jwts.go does not validate the JWT signature when verifying host tokens. After calling jwt.ParseWithClaims, the function only checks whether the returned token object is non-nil. It does not check token.Valid or the returned error. An attacker can forge a JWT signed with any key, set the claims to any host ID, and pull that host's full configuration including bcrypt-hashed passwords, MQTT credentials, and WireGuard peer data. The issue was patched in v1.5.0.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity low, availability none.

Weakness class

CVE-2026-38651 is classified as CWE-347: Improper Verification of Cryptographic Signature. A signature is not checked correctly, so forged or modified content is accepted as genuine.

Affected software

CVE-2026-38651 is recorded against 3 packages.

  • github.com/gravitl/netmaker
  • netmaker (fixed in 1.5.0)
  • unknown

Timeline and source

Published on 28 April 2026 and last revised on 25 June 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

nvd.nist.gov (Advisory)
github.com (Web)
github.com (Package)
www.zyenra.com (Web)

Details

Severity CRITICAL
CVSS Score 9.5
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
CWE CWE-347
Public Exploit ✅ No
Source NVD
Published 2026-04-28
Updated 2026-08-12
Modified 2026-06-25

Affected Packages

Software From version Fixed in
github.com/gravitl/netmaker — —
netmaker — 1.5.0
unknown — —

Similar Threats

Exploit Protection

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