CVE-2026-121452: high-severity vulnerability in mlogclub bbs-go
bbs-go through 4.4.6 Improper TLS Certificate Validation in SMTP Email Service
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.3epss 0.2%
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.
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N
Affected products
mlogclub · bbs-goRelated CVEs — mlogclub bbs-go
In the same product, most dangerous first.
References
https://github.com/mlogclub/bbs-gohttps://github.com/mlogclub/bbs-go/blob/v4.4.6/internal/services/email_service.go#L86-L113https://github.com/mlogclub/bbs-go/commit/1a06e35fa6314ee2d3ada70685a7afa740baf6f5https://github.com/mlogclub/bbs-go/issues/310https://www.vulncheck.com/advisories/bbs-go-through-4.4.6-improper-tls-certificate-validation-in-smtp-email-service