{"id":"CVE-2026-90776","revision":"1dfdd0031e1f4bc1936d2880aa41c60e","records":[{"revision":"1dfdd0031e1f4bc1936d2880aa41c60e","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-90776","aliases":[],"title":"Nodemailer 9.1.0 through 10.0.4 Denial of Service via Quadratic Address Parsing","description":"Nodemailer versions 9.1.0 through 10.0.4 contain a quadratic time complexity vulnerability in the addressparser component when parsing email addresses with RFC 5322 comments. Attackers can craft malicious email headers with comment-separated atoms to consume excessive CPU and block the Node.js event loop for several seconds, causing denial of service.","state":0,"publishedAt":"2026-09-13T11:42:26.391+00:00","modifiedAt":"2026-09-24T14:21:56.169+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\": \"9.1.0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"lessThan\": \"10.0.5\"\n                        },\n                        {\n                            \"version\": \"10.0.5\",\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:N/VA:H/SC:N/SI:N/SA:N","score":8.7,"severity":"HIGH"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5,"severity":"HIGH"}],"references":["https://github.com/nodemailer/nodemailer/security/advisories/GHSA-prgh-xp8r-p3m5","https://github.com/nodemailer/nodemailer/commit/c07f17518d25aca8ab2ad66968dcbca538c24b89","https://github.com/nodemailer/nodemailer/blob/v10.0.4/src/addressparser/index.ts#L251","https://github.com/nodemailer/nodemailer/releases/tag/v10.0.5","https://github.com/nodemailer/nodemailer","https://www.vulncheck.com/advisories/nodemailer-9.1.0-through-10.0.4-denial-of-service-via-quadratic-address-parsing"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-90776","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-90776","identifiers":["CVE-2026-90776"]},"retained":false,"historicalAffected":[]}],"coverage":[]}