Vulnerability in Mlogclub Bbs-Go
CVE-2026-121452
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.
Vulnerability class: Improper Certificate Validation
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/mlogclub/bbs-go/issues/310 (issue-tracking)
- github.com/mlogclub/bbs-go (product)
- github.com/mlogclub/bbs-go/commit/1a06e35fa6314ee2d3ada70685a7afa740baf6f5 (patch)
- github.com/mlogclub/bbs-go/blob/v4.4.6/internal/services/email_service.go (technical-description)
- www.vulncheck.com/advisories/bbs-go-through-4.4.6-improper-tls-certificate-vali… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-121452?
- CVE-2026-121452 is a medium-severity vulnerability in Mlogclub Bbs-Go, classified under Improper Certificate Validation. CVSS score: 6.5/10. Published 2026-11-03.
- How severe is CVE-2026-121452?
- Medium severity. CVSS v3 base score is 6.5 out of 10.