# CVE-2026-121452: bbs-go improper certificate validation in SMTP

Source: https://junglewise.ai/threats/cve-2026-121452-bbs-go-through-4-4-6-contains-an-improper-certificate-validation  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-03. Updated: 2026-11-03  
License: CC BY 4.0 with a link back

CVE-2026-121452 · Severity: medium · CVSS 6.5 · Published 2026-11-03

bbs-go is a lightweight community and Q&A platform that sends administrative emails such as password resets and account verification. A vulnerability in the SMTP email functionality disables certificate validation, allowing attackers on the network to intercept email traffic and steal credentials or modify sensitive emails sent to users.

Technologies: [Mlogclub Bbs-Go](https://junglewise.ai/threats/technologies/bbs-go). Vendors: [Mlogclub](https://junglewise.ai/threats/vendors/mlogclub).

## Quick answers

**Is CVE-2026-121452 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-121452 being exploited in the wild.

**How severe is CVE-2026-121452?** Medium severity, with a CVSS score of 6.5, published 3 November 2026.

**Which products and versions are affected?** Mlogclub Bbs-Go through 4.4.6.

**Is there a fix for CVE-2026-121452?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-121452 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-121452?** Check whether you run Mlogclub Bbs-Go at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The sendEmail() function in email_service.go sets InsecureSkipVerify to true in the TLS configuration, disabling certificate validation. An attacker with network access can perform a man-in-the-middle attack on SMTP connections to capture PLAIN authentication credentials and read or modify password-reset and verification emails.

## Affected products

- mlogclub bbs-go through 4.4.6

## Timeline

- 2026-11-03: disclosed

## References

- [https://github.com/mlogclub/bbs-go](https://github.com/mlogclub/bbs-go)
- [https://github.com/mlogclub/bbs-go/blob/v4.4.6/internal/services/email_service.go](https://github.com/mlogclub/bbs-go/blob/v4.4.6/internal/services/email_service.go)

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