{"cve":"CVE-2026-90776","nvd":{"published":"2026-09-13T12:17:16.547","modified":"2026-09-24T20:47:31.797","status":"Awaiting Analysis","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.","cvss_v4":{"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},"cvss_v3":{"version":"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},"cwes":["CWE-407"],"references":["https://github.com/nodemailer/nodemailer","https://github.com/nodemailer/nodemailer/blob/v10.0.4/src/addressparser/index.ts#L251","https://github.com/nodemailer/nodemailer/commit/c07f17518d25aca8ab2ad66968dcbca538c24b89","https://github.com/nodemailer/nodemailer/releases/tag/v10.0.5","https://github.com/nodemailer/nodemailer/security/advisories/GHSA-prgh-xp8r-p3m5"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:53:43.293028046+00:00"},"epss":{"cve":"CVE-2026-90776","score":0.00684,"percentile":0.52586,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-prgh-xp8r-p3m5","url":"https://osv.dev/vulnerability/GHSA-prgh-xp8r-p3m5","summary":"Nodemailer addressparser: O(n^2) on comment-joined addresses enables a remote DoS (reachable via mailparser)","modified":"2026-10-05T23:45:08.248427298Z","packages":[{"ecosystem":"npm","name":"nodemailer","purl":"pkg:npm/nodemailer","ranges":[">=9.1.0 <10.0.5"],"fixed":["10.0.5"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}