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CVE-2026-121426

Nodemailer 3.0.0 before 10.1.4 Recipient Domain Confusion via addressparser

8.3 High

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

0.22%Unchanged since Nov 4, 2026
90%50%10%1%

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 HighCVSS: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 MediumCVSS: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 HighCVSS: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 HighCVSS: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 MediumCVSS: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 HighCVSS: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 MediumCVSS: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 HighCVSS: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 HighCVSS: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 HighCVSS: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 MediumCVSS: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

Affected packages
PackageAffectedFixed
node-nodemailer
Debian: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 less
10.1.7+~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-nodemailer
Debian: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 less
10.1.7+~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-nodemailer
Debian: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 less
10.1.7+~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-nodemailer
Ubuntu: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-nodemailer
Ubuntu: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-nodemailer
Ubuntu: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-nodemailer
Ubuntu: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-nodemailer
Ubuntu: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

History
RecordedChangedSources
referencesCVE List
affected, aliases, referencesOSV
affected, aliases, referencesOSV
referencesOSV
publishedEUVD, NVD
facts, publishedEUVD
aliases, publishedEUVD
first indexedCVE 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

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