---
id: CVE-2026-121452
title: bbs-go through 4.4.6 Improper TLS Certificate Validation in SMTP Email Service
summary: >-
  bbs-go through 4.4.6 contains an improper certificate validation vulnerability
  that allows network-positioned attackers to intercept SMTP traffic because
  sendEmail() sets InsecureSkipVerify to true. Attackers can present any
  certificate …
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N'
cvssSource: cna
cwe:
  - CWE-295
vendor: mlogclub
product: bbs-go
affected:
  - bbs-go <= 4.4.6
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-03T17:21:23.781193Z'
published: '2026-11-03'
updated: '2026-11-03'
sourceUpdated: '2026-11-03T18:28:15.865Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-121452'
references:
  - url: 'https://github.com/mlogclub/bbs-go/issues/310'
    label: 'GitHub Issue #310'
  - url: 'https://github.com/mlogclub/bbs-go'
  - url: >-
      https://github.com/mlogclub/bbs-go/commit/1a06e35fa6314ee2d3ada70685a7afa740baf6f5
    label: Fix commit
  - url: >-
      https://github.com/mlogclub/bbs-go/blob/v4.4.6/internal/services/email_service.go#L86-L113
  - url: >-
      https://www.vulncheck.com/advisories/bbs-go-through-4.4.6-improper-tls-certificate-validation-in-smtp-email-service
    label: >-
      VulnCheck Advisory: bbs-go through 4.4.6 Improper TLS Certificate
      Validation in SMTP Email Service
tags:
  - cve.org
epss: 0.00235
epssPercentile: 0.14537
ingestedAt: '2026-11-05T20:33:06.354Z'
---

## Overview

bbs-go through 4.4.6 contains an improper certificate validation vulnerability that allows network-positioned attackers to intercept SMTP traffic because sendEmail() sets InsecureSkipVerify to true. Attackers can present any certificate to capture SMTP PLAIN auth credentials and read or modify outgoing password-reset and verification emails.

## Affected

- `bbs-go <= 4.4.6`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.