{"id":"CVE-2026-100702","title":"Nodemailer before 10.0.2 fails to properly flatten deeply nested arrays in recipient fields such as to, cc, and bcc, allowing attackers to cause stack exhaustion","summary":"Nodemailer before 10.0.2 fails to properly flatten deeply nested arrays in recipient fields such as to, cc, and bcc, allowing attackers to cause stack exhaustion. Attackers can supply a deeply nested JSON recipient array that triggers re…","severity":"medium","cvss":5.9,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-674","CWE-770"],"vendor":"nodemailer","product":"nodemailer","affected":["nodemailer < 10.0.2"],"published":"2026-09-26","updated":"2026-09-30","sourceUpdated":"2026-09-30T16:32:17.940","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-100702","references":[{"url":"https://github.com/nodemailer/nodemailer/security/advisories/GHSA-8vvx-rff5-p5rq","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/nodemailer-before-10.0.2-stack-exhaustion-via-nested-recipient-arrays","label":"disclosure@vulncheck.com"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-100702.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-100702"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2541816"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-100702"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-100702"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.0025,"epssPercentile":0.16276,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-26T23:11:09.180121Z"},"ingestedAt":"2026-09-26T13:33:20.902Z","slug":"CVE-2026-100702","body":"## Overview\n\nNodemailer before 10.0.2 fails to properly flatten deeply nested arrays in recipient fields such as to, cc, and bcc, allowing attackers to cause stack exhaustion. Attackers can supply a deeply nested JSON recipient array that triggers recursive Array.toString() conversion, exhausting the call stack and terminating the Node.js process.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Developer Hub, Red Hat Enterprise Linux 10, Self-service automation portal 2 · no fix planned: Red Hat Developer Hub, Red Hat Enterprise Linux 10, Self-service automation portal 2 · updated 2026-09-26 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-100702.json)","depth":"sunlit","depthScore":33,"depthScoreParts":{"impact":32.5,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}