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.
Published: 2026-08-26
Score: 8.3 High
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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History

Wed, 26 Aug 2026 21:30:00 +0000

Type Values Removed Values Added
First Time appeared Gravitl
Gravitl netmaker
Vendors & Products Gravitl
Gravitl netmaker

Wed, 26 Aug 2026 19:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Wed, 26 Aug 2026 16:00:00 +0000

Type Values Removed Values Added
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.
Title Netmaker through 1.6.0 Improper Certificate Validation in SMTP Client
First Time appeared Netmaker
Netmaker netmaker
Weaknesses CWE-295
CPEs cpe:2.3:a:netmaker:netmaker:*:*:*:*:*:*:*:*
Vendors & Products Netmaker
Netmaker netmaker
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N'}

cvssV4_0

{'score': 8.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N'}

Subscriptions

Gravitl Netmaker
Netmaker Netmaker
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-08-26T18:31:47.883Z

Reserved: 2026-08-26T15:23:07.420Z

Link: CVE-2026-81034

cve-icon Vulnrichment

Updated: 2026-08-26T18:31:43.643Z

cve-icon NVD

Status : Received

Published: 2026-08-26T16:16:46.310

Modified: 2026-08-26T19:17:19.600

Link: CVE-2026-81034

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-26T21:15:04Z

Weaknesses