CVE-2026-38651

Summary

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

Affected Software

Weaknesses

• n/a

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: poc
  • Automatable: yes
  • Technical Impact: partial

Additional References

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

References

• https://github.com/gravitl/netmaker/commit/5309aa70d464ef565911369714d661a61481a79b
• https://www.zyenra.com/blog/netmaker-jwt-verification-bypass
• https://www.zyenra.com/advisories/netmaker-jwt-verification-bypass

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