CVE-2026-121426
Nodemailer 3.0.0 before 10.1.4 Recipient Domain Confusion via addressparser
Nodemailer from 3.0.0 before 10.1.4 contains an address parsing vulnerability in addressparser that ends an angle-addr at a '>' inside a quoted local part, comment or domain literal. Attackers can submit addresses that validate as an allowed domain but are delivered to an attacker-controlled domain, bypassing recipient allow lists and disclosing message content.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
8.3
Nodemailer 3.0.0 before 10.1.4 Recipient Domain Confusion via addressparser
Nodemailer from 3.0.0 before 10.1.4 contains an address parsing vulnerability in addressparser that ends an angle-addr at a '>' inside a quoted local part, comment or domain literal. Attackers can submit addresses that validate as an allowed domain but are delivered to an attacker-controlled domain, bypassing recipient allow lists and disclosing message content.
- Record
CVE-2026-121426- CVSS 4.0
- 8.3 High
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N - CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N - Weakness
- CWE-20
- Updated
- 2026-11-07
EUVDEUVD-2026-115958
8.3
Nodemailer from 3.0.0 before 10.1.4 contains an address parsing vulnerability in addressparser that ends an angle-addr at a '>' inside a quoted local part, comment or domain literal. Attackers can submit addresses that validate as an allowed domain but are delivered to an attacker-controlled domain, bypassing recipient allow lists and disclosing message content.
- Record
EUVD-2026-115958- CVSS 4.0
- 8.3 High
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N - Updated
- 2026-11-07
GitHub AdvisoriesGHSA-crhf-rr59-7pch
8.3
Nodemailer from 3.0.0 before 10.1.4 contains an address parsing vulnerability in addressparser...
Nodemailer from 3.0.0 before 10.1.4 contains an address parsing vulnerability in addressparser that ends an angle-addr at a '>' inside a quoted local part, comment or domain literal. Attackers can submit addresses that validate as an allowed domain but are delivered to an attacker-controlled domain, bypassing recipient allow lists and disclosing message content.
- Record
GHSA-crhf-rr59-7pch- CVSS 4.0
- 8.3 High
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N - Weakness
- CWE-20
- Updated
- 2026-11-03
NVD
8.3
Nodemailer from 3.0.0 before 10.1.4 contains an address parsing vulnerability in addressparser that ends an angle-addr at a '>' inside a quoted local part, comment or domain literal. Attackers can submit addresses that validate as an allowed domain but are delivered to an attacker-controlled domain, bypassing recipient allow lists and disclosing message content.
- Record
CVE-2026-121426- CVSS 4.0
- 8.3 High
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N - Weakness
- CWE-20
- Updated
- 2026-11-07
OSV
8.3
Nodemailer 3.0.0 before 10.1.4 Recipient Domain Confusion via addressparser
Nodemailer from 3.0.0 before 10.1.4 contains an address parsing vulnerability in addressparser that ends an angle-addr at a '>' inside a quoted local part, comment or domain literal. Attackers can submit addresses that validate as an allowed domain but are delivered to an attacker-controlled domain, bypassing recipient allow lists and disclosing message content.
- Record
CVE-2026-121426- CVSS 4.0
- 8.3 High
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N - Weakness
- CWE-20
- Updated
- 2026-11-05
OSVDEBIAN-CVE-2026-121426
8.3
Nodemailer from 3.0.0 before 10.1.4 contains an address parsing vulnerability in addressparser that ends an angle-addr at a '>' inside a quoted local part, comment or domain literal. Attackers can submit addresses that validate as an allowed domain but are delivered to an attacker-controlled domain, bypassing recipient allow lists and disclosing message content.
- Record
DEBIAN-CVE-2026-121426- CVSS 4.0
- 8.3 High
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - Updated
- 2026-11-07
OSVUBUNTU-CVE-2026-121426
8.3
Nodemailer from 3.0.0 before 10.1.4 contains an address parsing vulnerability in addressparser that ends an angle-addr at a '>' inside a quoted local part, comment or domain literal. Attackers can submit addresses that validate as an allowed domain but are delivered to an attacker-controlled domain, bypassing recipient allow lists and disclosing message content.
- Record
UBUNTU-CVE-2026-121426- CVSS 4.0
- 8.3 High
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N - CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N - Updated
- 2026-11-05
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
node-nodemailerDebian:12 |
All versions, plus listed versions 10.0.0+~8.0.1-110.0.10+~8.0.1-110.0.10+~8.0.2-110.0.13+~8.0.2-110.0.14+~8.0.2-1 Show 25 moreShow less10.1.7+~8.0.2-16.10.0+~6.4.17-16.8.0+~6.4.6-16.9.13+~6.4.14-16.9.15+~6.4.16-16.9.16+~6.4.16-16.9.4+~6.4.9-16.9.4+~6.4.9-26.9.4+~6.4.9-36.9.4+~6.4.9-47.0.10+~7.0.2-17.0.12+~7.0.5-17.0.5+~7.0.1-17.0.6+~7.0.1-17.0.9+~7.0.2-17.0.9+~7.0.2-28.0.11+~8.0.1-18.0.2+~7.0.11-18.0.3+~7.0.11-18.0.4+~7.0.11-18.0.4+~7.0.11-29.0.0+~8.0.1-19.0.3+~8.0.1-19.0.5+~8.0.1-19.0.6+~8.0.1-1 |
None known |
node-nodemailerDebian:13 |
All versions, plus listed versions 10.0.0+~8.0.1-110.0.10+~8.0.1-110.0.10+~8.0.2-110.0.13+~8.0.2-110.0.14+~8.0.2-1 Show 18 moreShow less10.1.7+~8.0.2-16.10.0+~6.4.17-16.10.0+~6.4.17-1+deb13u17.0.10+~7.0.2-17.0.12+~7.0.5-17.0.5+~7.0.1-17.0.6+~7.0.1-17.0.9+~7.0.2-17.0.9+~7.0.2-28.0.11+~8.0.1-18.0.2+~7.0.11-18.0.3+~7.0.11-18.0.4+~7.0.11-18.0.4+~7.0.11-29.0.0+~8.0.1-19.0.3+~8.0.1-19.0.5+~8.0.1-19.0.6+~8.0.1-1 |
None known |
node-nodemailerDebian:14 |
All versions, plus listed versions 10.0.0+~8.0.1-110.0.10+~8.0.1-110.0.10+~8.0.2-110.0.13+~8.0.2-110.0.14+~8.0.2-1 Show 17 moreShow less10.1.7+~8.0.2-16.10.0+~6.4.17-17.0.10+~7.0.2-17.0.12+~7.0.5-17.0.5+~7.0.1-17.0.6+~7.0.1-17.0.9+~7.0.2-17.0.9+~7.0.2-28.0.11+~8.0.1-18.0.2+~7.0.11-18.0.3+~7.0.11-18.0.4+~7.0.11-18.0.4+~7.0.11-29.0.0+~8.0.1-19.0.3+~8.0.1-19.0.5+~8.0.1-19.0.6+~8.0.1-1 |
None known |
node-nodemailerUbuntu:20.04:LTS |
All versions, plus listed versions 6.3.0-26.3.1-16.4.0-16.4.1-16.4.2-16.4.5-1 |
None known |
node-nodemailerUbuntu:22.04:LTS |
All versions, plus listed versions 6.4.17-36.7.0-16.7.0-26.7.1+~6.4.4-1 |
None known |
node-nodemailerUbuntu:24.04:LTS |
All versions, plus listed versions 6.9.4+~6.4.9-26.9.4+~6.4.9-3ubuntu16.9.4+~6.4.9-4 |
None known |
node-nodemailerUbuntu:26.10 |
All versions, plus listed versions 8.0.4+~7.0.11-18.0.4+~7.0.11-29.0.0+~8.0.1-19.0.3+~8.0.1-19.0.5+~8.0.1-1 |
None known |
node-nodemailerUbuntu:26.04:LTS |
All versions, plus listed versions 7.0.5+~7.0.1-17.0.9+~7.0.2-27.0.10+~7.0.2-17.0.12+~7.0.5-18.0.4+~7.0.11-1 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| references | CVE List | |
| affected, aliases, references | OSV | |
| affected, aliases, references | OSV | |
| references | OSV | |
| published | EUVD, NVD | |
| facts, published | EUVD | |
| aliases, published | EUVD | |
| first indexed | CVE List, GitHub Advisories |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-121426 is a high vulnerability (CVSS 8.3) in Nodemailer, published November 3, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.22%, the 12th percentile. No source names a fixed version.
References
github.com/nodemailer/nodemailer/security/advisories/GHSA-85x2-q946-cp5h
vulncheck.com/advisories/nodemailer-3.0.0-before-10.1.4-recipient-domain-confusion-via-addressparser
nvd.nist.gov/vuln/detail/CVE-2026-121426
github.com/advisories/GHSA-crhf-rr59-7pch
github.com/CVEProject/cvelistV5/tree/main/cves/2026/121xxx/CVE-2026-121426.json
security-tracker.debian.org/tracker/CVE-2026-121426
ubuntu.com/security/CVE-2026-121426
cve.org/CVERecord?id=CVE-2026-121426