CVE-2026-121452
bbs-go through 4.4.6 Improper TLS Certificate Validation in SMTP Email Service
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.
Fixes and workarounds
Fix
The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.
Source: CNA: VulnCheckAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| bbs-go mlogclub bbs-go
golang |
≥ 0; ≤ 4.4.6 (affected, semver)
Other versions: unaffected |
CNA: VulnCheck |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 8.3 high |
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 | CNA: VulnCheck |
| 3.1 / 6.5 medium |
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N | CNA: VulnCheck |
| 4.0 / 8.3 high |
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X | NVD: [email protected] |
| 3.1 / 6.5 medium |
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N | NVD: [email protected] |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://github.com/mlogclub/bbs-go/issues/310CNA: VulnCheck · issue-tracking
- https://github.com/mlogclub/bbs-goCNA: VulnCheck · product
- https://github.com/mlogclub/bbs-go/commit/1a06e35fa6314ee2d3ada70685a7afa740baf6f5CNA: VulnCheck · patch
- https://github.com/mlogclub/bbs-go/blob/v4.4.6/internal/services/email_service.go#L86-L113CNA: VulnCheck · technical-description
- https://www.vulncheck.com/advisories/bbs-go-through-4.4.6-improper-tls-certificate-validation-in-smtp-email-serviceCNA: VulnCheck · third-party-advisory
- https://github.com/mlogclub/bbs-go[email protected]
- https://github.com/mlogclub/bbs-go/blob/v4.4.6/internal/services/email_service.go#L86-L113[email protected]
- https://github.com/mlogclub/bbs-go/commit/1a06e35fa6314ee2d3ada70685a7afa740baf6f5[email protected]
- https://github.com/mlogclub/bbs-go/issues/310[email protected]
- https://www.vulncheck.com/advisories/bbs-go-through-4.4.6-improper-tls-certificate-validation-in-smtp-email-service[email protected]
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