CVE-2026-38651

HIGH

Netmaker < 1.5.0 - Authentication Bypass via JWT Signature Verification Failure

Title source: llm

Description

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

References (4)

Core 4

Core References

https://github.com/gravitl/netmaker/commit/5309aa70d464ef565911369714d661a61481a79b

View Patch ZIP pw:eip

https://www.zyenra.com/blog/netmaker-jwt-verification-bypass

https://www.zyenra.com/advisories/netmaker-jwt-verification-bypass

Various Sources

https://www.zyenra.com/advisories/netmaker-jwt-verification-bypass/

Scores

CVSS v3 8.2

EPSS 0.0030

EPSS Percentile 21.2%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N

CISA SSVC

Vulnrichment

Exploitation poc

Automatable yes

Technical Impact partial

Details

CWE

CWE-347

Status published

Products (2)

gravitl/netmaker 0 - 1.5.0Go

netmaker/netmaker < 1.5.0

Published Apr 28, 2026

Tracked Since Apr 28, 2026