{"id":"CVE-2026-100700","summary":"nodemailer before 10.0.6 Denial of Service via addressparser","details":"nodemailer before 10.0.6 contains a denial of service vulnerability in the addressparser free-text fallback regex pattern that exhibits quadratic backtracking behavior. Attackers can supply crafted email header values with long whitespace-free runs to block the Node.js event loop for tens of seconds, causing service unavailability.","aliases":["GHSA-v53p-9fqp-m79j"],"modified":"2026-09-28T03:48:31.671617586Z","published":"2026-09-26T13:23:56.526Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/100xxx/CVE-2026-100700.json","cna_assigner":"VulnCheck","cwe_ids":["CWE-407"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/100xxx/CVE-2026-100700.json"},{"type":"ADVISORY","url":"https://github.com/nodemailer/nodemailer/security/advisories/GHSA-v53p-9fqp-m79j"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-100700"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/nodemailer-before-10.0.6-denial-of-service-via-addressparser"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/nodemailer/nodemailer","events":[{"introduced":"0"},{"fixed":"933d263f3efe76a37f4d78daf52c89b4d70cef8f"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"10.0.6"}],"source":["AFFECTED_FIELD","DESCRIPTION"]}}],"versions":["v10.0.5","v10.0.4","v10.0.3","v10.0.2","v10.0.1","v10.0.0","v9.1.1","v9.1.0","v9.0.6","v9.0.5","v9.0.4","v9.0.3","v9.0.2","v9.0.1","v9.0.0","v8.0.11","v8.0.10","v8.0.9","v8.0.8","v8.0.7","v8.0.6","v8.0.5","v8.0.4","v8.0.3","v8.0.2","v8.0.1","v8.0.0","v7.0.13","v7.0.12","v7.0.11","v7.0.10","v7.0.9","v7.0.7","v7.0.6","v7.0.5","v6.9.16","v6.9.15","v6.9.14","v6.9.13","v6.9.10","v6.9.8","v6.9.7","v6.9.6","v6.9.5","v6.9.4","v6.9.3","v6.9.2","v6.9.1","v6.9.0","v6.8.0","v6.7.8","v6.7.7","v6.7.6","v6.7.5","v6.7.4","v6.7.3","v6.7.2","v6.7.1","v6.7.0","v6.6.5","v6.6.4","v6.6.3","v6.6.1","v6.6.0","v6.5.0","v6.4.18","v6.4.17","v6.4.16","v6.4.15","v6.4.14","v6.4.13","v6.4.12","v6.4.11","v6.4.10","v6.4.8","v6.4.7","v6.4.6","v6.4.5","v6.4.4","v6.4.3","v6.4.2","v6.4.1","v6.4.0","v6.3.1","v6.3.0","v6.2.1","v6.2.0","v6.1.1","v6.1.0","v6.0.0","v5.1.1","v5.1.0","v5.0.1","v5.0.0","v4.7.0","v4.6.8","v4.6.7","v4.6.6","v4.6.5","v4.6.4","v4.6.3","v4.6.2","v4.6.1","v4.6.0","v4.5.0","v4.4.2","v4.4.1","v4.4.0","v4.3.1","v4.3.0","v4.2.0","v4.1.3","v4.1.2","v4.1.1","v4.1.0","v4.0.1","v4.0.0","v3.1.8","v3.1.7","v3.1.6","v3.1.5","v3.1.4","v3.1.3","v3.1.2","v3.1.1","v3.1.0","v3.0.2","v3.0.1","v3.0.0","v2.7.2","v2.7.1","v2.7.0","v2.6.4","v2.6.3","v2.6.2","v2.6.1","v2.6.0","v2.5.0","v2.4.2","v2.4.1","v2.4.0","v2.3.2","v2.3.2-gpgtest.0","v2.3.1","v2.3.0","v2.2.1","v2.2.0","v2.1.0","v2.0.0","v1.11.0","v1.10.0","v1.9.0","v1.8.0","v1.7.0","v1.6.0","v1.5.0","v1.4.0","v1.3.4","v1.3.3","v1.3.2","v1.3.1","v1.3.0","v1.2.2","v1.2.1","v1.2.0","v1.1.2","v1.1.1","v1.1.0","v1.0.4","v1.0.3","v1.0.2","v1.0.1","v1.0.0","v0.7.1","v0.7.0","v0.6.5","v0.6.4","v0.6.3","v0.6.2","v0.6.1","v0.6.0","v0.5.15","v0.5.14","v0.5.13","v0.5.12","v0.5.11","v0.5.9","v0.5.8","v0.5.7","v0.5.6","v0.5.5","v0.5.4","v0.5.3","v0.5.2","v0.5.1","v0.5.0","v0.4.4","v0.4.3","v0.4.2","v0.4.1","v0.4.0","v0.3.45","v0.3.44","v0.3.43","v0.3.42","v0.3.41","v0.3.40","v0.3.39","v0.3.38","v0.3.37","v0.3.35","v0.3.34","v0.3.33","v0.3.32","v0.3.31","v0.3.30","v0.3.29","v0.3.28","v0.3.27","v0.3.26","v0.3.25","v0.3.22","v0.3.21","v0.3.20","v0.3.19","v0.3.18","v0.3.17","v0.3.16","v0.3.15","v0.3.14","v0.3.13","v0.3.12","v0.3.11","v0.3.10","v0.3.9","v0.3.8","v0.3.7","v0.3.6","v0.3.5","v0.3.4","v0.3.3","v0.3.2","v0.3.1","v0.3.0","v0.2.4","v0.2.3","v0.2.2","v0.2.0","v0.1.24","v0.1.23","v0.1.22","v0.1.21","v0.1.20","v0.1.19","v0.1.17","v0.1.16","v0.1.15","v0.1.14","v0.1.13","v0.1.12","v0.1.10","v0.1.9","v0.1.8","v0.1.7","v0.1.6","v0.1.5","v0.1.4","v0.1.3","v0.1.2","v0.1.1","v0.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-100700.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"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"}]}