Vulnerability · Published Nov 3, 2026 · Assigned by VulnCheck
CVE-2026-121452bbs-go through 4.4.6 Improper TLS Certificate Validation in SMTP Email Service
Medium 6.5
In plain English
A medium-severity improper certificate validation in bbs-go from mlogclub. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 15% of all known vulnerabilities).
Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)0.2%top 85.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
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 products (as reported)
Weakness: CWE-295 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N
References
- GitHub Issue #310 issue-tracking
- https://github.com/mlogclub/bbs-go product
- Fix commit patch
- https://github.com/mlogclub/bbs-go/blob/v4.4.6/internal/services/email_service.go#L86-L113 technical-description
- VulnCheck Advisory: bbs-go through 4.4.6 Improper TLS Certificate Validation in SMTP Email Service third-party-advisory