CVE-2026-81034 Netmaker through 1.6.0 Improper Certificate Validation in SMTP Client
Netmaker disables TLS certificate verification for SMTP, allowing attackers to intercept password reset tokens and invitation links via man-in-the-middle attacks.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-81034?
CVE-2026-81034 is a high-severity vulnerability in gravitl netmaker, published on 26 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-295
Which versions are affected by CVE-2026-81034?
How do I fix CVE-2026-81034?
No fix has been published for CVE-2026-81034 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-81034 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-81034 exists.
Sources
Also known as GHSA-36r8-h3x6-x34c.