{"id":"CVE-2026-121452","aliases":["EUVD-2026-115884","GHSA-4ffj-9jv6-m8p5"],"status":"published","title":"bbs-go through 4.4.6 Improper TLS Certificate Validation in SMTP Email Service","description":"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.","severity":{"version":"4.0","score":8.3,"vector":"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","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00235,"percentile":0.14598,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-295"],"published":"2026-11-03T15:17:01Z","modified":"2026-11-04T02:47:31Z","products":[{"vendor":"mlogclub","product":"bbs-go"}],"references":[{"url":"https://github.com/mlogclub/bbs-go/issues/310","tags":["issue-tracking","report"]},{"url":"https://github.com/mlogclub/bbs-go","tags":["product","package"]},{"url":"https://github.com/mlogclub/bbs-go/commit/1a06e35fa6314ee2d3ada70685a7afa740baf6f5","tags":["patch","fix"]},{"url":"https://github.com/mlogclub/bbs-go/blob/v4.4.6/internal/services/email_service.go#L86-L113","tags":["technical-description","article"]},{"url":"https://www.vulncheck.com/advisories/bbs-go-through-4.4.6-improper-tls-certificate-validation-in-smtp-email-service","tags":["third-party-advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121452","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-4ffj-9jv6-m8p5"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/121xxx/CVE-2026-121452.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-121452","title":"bbs-go through 4.4.6 Improper TLS Certificate Validation in SMTP Email Service","description":"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.","status":"published","published":"2026-11-03T15:17:01.813Z","modified":"2026-11-03T18:28:15.865Z","cvss":[{"version":"4.0","score":8.3,"vector":"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","level":"high","assessor":"cna"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-295"],"updated_at":"2026-11-03T20:02:16.924578Z"}],"euvd":[{"id":"EUVD-2026-115884","description":"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.","status":"published","published":"2026-11-03T15:17:01Z","modified":"2026-11-03T18:28:15Z","cvss":[{"version":"4.0","score":8.3,"vector":"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","level":"high"}],"updated_at":"2026-11-03T21:20:13.974366Z"}],"ghsa":[{"id":"GHSA-4ffj-9jv6-m8p5","title":"bbs-go through 4.4.6 contains an improper certificate validation vulnerability that allows...","description":"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.","status":"published","published":"2026-11-03T18:31:02Z","modified":"2026-11-03T18:31:03Z","cvss":[{"version":"4.0","score":8.3,"vector":"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","level":"high"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N","level":"medium"}],"cwes":["CWE-295"],"updated_at":"2026-11-03T19:01:31.965978Z"}],"nvd":[{"id":"CVE-2026-121452","description":"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.","status":"published","published":"2026-11-03T16:17:24.12Z","modified":"2026-11-03T19:18:03.793Z","cvss":[{"version":"4.0","score":8.3,"vector":"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","level":"high","assessor":"secondary"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-295"],"updated_at":"2026-11-03T22:58:51.822037Z"}],"osv":[{"id":"CVE-2026-121452","title":"bbs-go through 4.4.6 Improper TLS Certificate Validation in SMTP Email Service","description":"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.","status":"published","published":"2026-11-03T15:17:01.813Z","modified":"2026-11-11T10:47:25.975078962Z","cvss":[{"version":"4.0","score":8.3,"vector":"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","level":"high"}],"cwes":["CWE-295"],"updated_at":"2026-11-11T03:22:28.447808Z"}]}}