CVE-2026-110870— Nodemailer before 10.0.13 Improper Input Validation via Angle-Bracket Address Comments
Quick assessment
Affected
nodemailer nodemailer
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
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 a parenthesized commen
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I. Basic Information for CVE-2026-110870
Vulnerability Information
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Vulnerability Title
Nodemailer before 10.0.13 Improper Input Validation via Angle-Bracket Address Comments
Source: CVE Program / CVE List V5
Vulnerability Description
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 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| nodemailer | nodemailer | 3.0.0 ~ 10.0.13 | - |
|
II. Public POCs for CVE-2026-110870
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2026-110870 (2)
Same Patch Batch · nodemailer · 2026-10-14 · 4 CVEs total
| CVE-2026-110869 | 7.5 HIGH | Nodemailer 3.0.0 before 10.0.13 ReDoS via SMTP AUTH Mechanism Detection Regexes |
| CVE-2026-110871 | 6.5 MEDIUM | Nodemailer 3.0.0 before 10.0.10 Quadratic DKIM Header Unfolding Denial of Service |
| CVE-2026-110872 | 5.9 MEDIUM | Nodemailer 3.0.0 before 10.0.10 Denial of Service via SMTP Reply Parsing |
IV. Related Vulnerabilities
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CVE-2026-110872
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CVE-2026-110871
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CVE-2026-110869
Nodemailer 3.0.0 before 10.0.13 ReDoS via SMTP AUTH Mechanis -
CVE-2026-100702
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CVE-2026-110872
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CVE-2026-110871
Nodemailer 3.0.0 before 10.0.10 Quadratic DKIM Header Unfold -
CVE-2026-110869
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CVE-2026-100702
Nodemailer before 10.0.2 Stack Exhaustion via Nested Recipie -
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Same weakness: CWE-20
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V. Comments for CVE-2026-110870
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