{"id":"CVE-2026-110870","title":"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","summary":"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…","severity":"medium","cvss":5.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","cwe":["CWE-20","CWE-791"],"published":"2026-10-14","updated":"2026-10-14","sourceUpdated":"2026-10-14T23:17:28.813","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-110870","references":[{"url":"https://github.com/nodemailer/nodemailer/security/advisories/GHSA-g73g-hqqh-jr95","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/nodemailer-before-10.0.13-improper-input-validation-via-angle-bracket-address-comments","label":"disclosure@vulncheck.com"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-110870.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-110870"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2552969"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-110870"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-110870"}],"tags":["nvd","cve.org","csaf","vex","red-hat","exploit-available"],"ingestedAt":"2026-10-15T00:02:07.189Z","vendor":"nodemailer","product":"nodemailer","affected":["nodemailer >= 3.0.0 < 10.0.13"],"epss":0.00266,"epssPercentile":0.1866,"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"yes","technicalImpact":"partial","timestamp":"2026-10-26T15:20:41.950895Z"},"slug":"CVE-2026-110870","body":"## Overview\n\nNodemailer 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.\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 2026-10-16 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-110870.json)","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":29.2,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":229599,"id":"CVE-2026-110870","ts":1793028611824,"field":"exploit_available","old":"false","new":"true"}]}