{"id":"CVE-2026-110870","revision":"9308338e37684d83b9d906f12e3e61ae","records":[{"revision":"9308338e37684d83b9d906f12e3e61ae","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-110870","aliases":[],"title":"Nodemailer before 10.0.13 Improper Input Validation via Angle-Bracket Address Comments","description":"Nodemailer from 3.0.0 before 10.0.13 contains an improper input validation vulnerability in its address parser that fails to strip RFC 5322 comments inside angle-bracket addresses. Attackers can supply recipients like a display name with a parenthesized comment in the domain, so illegal characters reach envelope.to and RCPT TO, causing rejected delivery or parser interpretation conflicts that bypass domain allow-lists.","state":0,"publishedAt":"2026-10-14T22:52:58.787+00:00","modifiedAt":"2026-10-14T22:52:58.787+00:00","affected":[{"ecosystem":"Vendor product","name":"nodemailer","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"nodemailer\",\n                    \"product\": \"nodemailer\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"packageURL\": \"pkg:npm/nodemailer\",\n                    \"versions\": [\n                        {\n                            \"version\": \"3.0.0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"lessThan\": \"10.0.13\"\n                        },\n                        {\n                            \"version\": \"10.0.13\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","score":6.9,"severity":"MEDIUM"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","score":5.3,"severity":"MEDIUM"}],"references":["https://github.com/nodemailer/nodemailer/security/advisories/GHSA-g73g-hqqh-jr95","https://www.vulncheck.com/advisories/nodemailer-before-10.0.13-improper-input-validation-via-angle-bracket-address-comments"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-110870","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-110870","identifiers":["CVE-2026-110870"]},"retained":false,"historicalAffected":[]}],"coverage":[]}