CVE-2026-38651
highpriority · track · 0EPSS 0.003 · 22 %ileEUUSEPSS · scored 2026-10-27
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
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (3)
Products and version ranges known to be affected.
advisories (2)
Vendor and ecosystem advisories describing this.
- GHSA-qpv2-rwc8-c993Netmaker does not verify JWT signatures for host tokens2026-04-28ghsa · osvUS
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.
- GO-2026-5588Netmaker does not verify JWT signatures for host tokens in github.com/gravitl/netmaker2026-06-25vendor · osvUS
Netmaker does not verify JWT signatures for host tokens in github.com/gravitl/netmaker
also known as (5)
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sources
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references (10)
External citations — patches, advisories, analysis.
- https://access.redhat.com/security/cve/cve-2026-38651cnnvd
- https://github.com/gravitl/netmaker/releasesPatchcnnvd
- https://nvd.nist.gov/vuln/detail/CVE-2026-38651cnnvd
- https://github.com/gravitl/netmaker/commit/5309aa70d464ef565911369714d661a61481a79benisa_euvd
- https://www.zyenra.com/advisories/netmaker-jwt-verification-bypassenisa_euvd
- https://www.zyenra.com/blog/netmaker-jwt-verification-bypassenisa_euvd
- https://github.com/gravitl/netmaker/commit/5309aa70d464ef565911369714d661a61481a79bPatchnvd
- https://www.zyenra.com/advisories/netmaker-jwt-verification-bypassExploitThird Party Advisorynvd
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