CVE-2026-81034
MediumCVSS 6.5Exploitation Probability (EPSS)
Low risk6th percentile - higher than 6% of all known CVEs
Summary
Netmaker disables certificate verification on the connection to the configured mail server. The skip-verify field is set to true unconditionally, allowing the client to accept any certificate, including one from an interposing party. Mail sent by Netmaker includes password-reset messages with single-use tokens and user invitations with enrolment links, which can be intercepted.
Risk Assessment
An attacker on the path between the server and the mail relay can intercept messages with reset tokens and use them before the intended recipient, potentially leading to account takeover.
Recommendation
Update Netmaker to a version that restores certificate verification (e.g., from the development branch) or manually configure TLS verification.
Other vulnerabilities in Netmaker
See all- CVE-2026-38651High
An 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, allowing an attacker to forge a JWT and impersonate any host in the network.
- CVE-2023-32079High
A mass assignment vulnerability was found in Netmaker, which creates networks with WireGuard, in versions prior to 0.17.1 and 0.18.6 that allows a non-admin user to escalate privileges to those of an admin user.
- CVE-2023-32078High
In Netmaker, which creates networks with WireGuard, an Insecure Direct Object Reference (IDOR) vulnerability was found in the user update function in versions prior to 0.17.1 and 0.18.6. It allows updating another user's password by specifying their username.
- CVE-2023-32077High
In Netmaker, prior to versions 0.17.1 and 0.18.6, hardcoded DNS key usage was found, allowing unauth users to interact with DNS API endpoints. The issue is patched in versions 0.17.1 and 0.18.6.
- CVE-2022-36110High
Netmaker prior to version 0.15.1 had an improper authorization issue that allowed non-privileged users to execute privileged API calls. Users added to the Netmaker platform without admin privileges could use their auth tokens to run admin-level functions via the API.
Original NVD description (English source)
Netmaker disables certificate verification on the connection to the configured mail server. The sender in pro/email/smtp.go assigns a TLS configuration whose skip-verify field is set to true unconditionally, directly beneath a comment stating that the setting should be false in production. No configuration value governs it and no code path restores verification, so the client accepts any certificate the mail server presents, including one an interposing party supplies. Mail that Netmaker sends over that connection includes password-reset messages carrying single-use tokens and user invitations carrying enrolment links, so a party positioned on the path between the server and its mail relay can read those messages in transit and use a captured reset token before the intended recipient does. The setting is absent from the development branch but present in the latest release.