CVE-2026-110870CWE-20

CVE-2026-110870

Medium · published October 15, 2026

CVSS v3.1
5.3
EPSS
0%
Percentile
11.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CVSS v4.0
6.9 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
EPSS
0.00220 · 11.9th percentile
Weakness
CWE-20 · Improper Input Validation
Published
2026-10-15T03:17Z
References (2)
https://github.com/nodemailer/nodemailer/security/advisories/GHSA-g73g-hqqh-jr95 · [email protected]https://www.vulncheck.com/advisories/nodemailer-before-10.0.13-improper-input-validation-via-angle-bracket-address-comments · [email protected]
EPSS history
Timeline
  • 16 OCT 03:27Z
    EPSS moved — → 0%
    epss
  • 14 OCT 22:52Z
    Nodemailer before 10.0.13 Improper Input Validation via Angle-Bracket Address Comments
    cvelistv5
  • 14 OCT 22:52Z
    Nodemailer before 10.0.13 Improper Input Validation via Angle-Bracket Address Comments
    cvelistv5