Vulnerability in Netmaker
CVE-2026-38651
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
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N.
EPSS exploit prediction
EPSS: 0.004 (35.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 36th percentile — 35.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.001
Affected products
Weakness classification (CWE)
References
- github.com/gravitl/netmaker/commit/5309aa70d464ef565911369714d661a61481a79b (Patch)
- www.zyenra.com/blog/netmaker-jwt-verification-bypass (Exploit, Third Party Advisory)
- www.zyenra.com/advisories/netmaker-jwt-verification-bypass (Exploit, Third Party Advisory)
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2026-38651?
- CVE-2026-38651 is a high-severity vulnerability in Netmaker, classified under Improper Verification of Cryptographic Signature. CVSS score: 8.2/10. Published 2026-04-28.
- How severe is CVE-2026-38651?
- High severity. CVSS v3 base score is 8.2 out of 10.