CVE-2026-121452 json
bbs-go through 4.4.6 Improper TLS Certificate Validation in SMTP Email Service
published 6d ago modified 6d ago also EUVD-2026-115884
- cvss
- 6.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 14%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
Is CVE-2026-121452 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 6d ago
Exploit prediction
0.24% chance of exploitation in the next 30 days, higher than 14% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 8.3 | 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 | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N |
| CNA | 4.0 | 8.3 | 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 |
Affected products
- mlogclub bbs-go
Classification
- Weakness
-
- CWE-295 Improper Certificate Validation
References
-
github.com
/mlogclub/bbs-go/commit/1a06e35fa6314ee2d3ada70685a7afa740baf6f5
patch
-
github.com
/mlogclub/bbs-go/issues/310
issue-tracking
-
github.com
/mlogclub/bbs-go
product
-
github.com
/mlogclub/bbs-go/blob/v4.4.6/internal/services/email_service.go#L86-L113
technical-description
-
vulncheck.com
/advisories/bbs-go-through-4.4.6-improper-tls-certificate-validation-in-smtp-email-service
third-party-advisory
Sources
- CVE List CVE-2026-121452
- NVD CVE-2026-121452
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