CVE-2026-38651

critical

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

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

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

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

Details

Source: Mitre, NVD

Published: 2026-04-28

Updated: 2026-05-18

Risk Information

CVSS v2

Base Score: 8.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:P/A:N

Severity: High

CVSS v3

Base Score: 8.2

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

Severity: High

CVSS v4

Base Score: 9.2

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N

Severity: Critical

EPSS

EPSS: 0.00039