CVE-2026-125755
Nodemailer 3.0.0 before 10.4.1 Recipient Allow-List Bypass via addressparser
Nodemailer 3.0.0 before 10.4.1 contains an address parsing flaw in addressparser that truncates domains at folding whitespace or comments before a dot, allowing attackers to bypass recipient domain restrictions. Attackers can submit crafted to, cc, bcc or replyTo addresses that pass RFC 5322 domain checks but deliver mail to an attacker-chosen address under the application's sender identity.
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
Nodemailer 3.0.0 before 10.4.1 Recipient Allow-List Bypass via addressparser
Nodemailer 3.0.0 before 10.4.1 contains an address parsing flaw in addressparser that truncates domains at folding whitespace or comments before a dot, allowing attackers to bypass recipient domain restrictions. Attackers can submit crafted to, cc, bcc or replyTo addresses that pass RFC 5322 domain checks but deliver mail to an attacker-chosen address under the application's sender identity.
- Record
CVE-2026-125755- 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-436
- Updated
- 2026-11-10
EUVDEUVD-2026-121238
Nodemailer 3.0.0 before 10.4.1 contains an address parsing flaw in addressparser that truncates domains at folding whitespace or comments before a dot, allowing attackers to bypass recipient domain restrictions. Attackers can submit crafted to, cc, bcc or replyTo addresses that pass RFC 5322 domain checks but deliver mail to an attacker-chosen address under the application's sender identity.
- Record
EUVD-2026-121238- 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
- 2026-11-10
GitHub AdvisoriesGHSA-j5rx-43mx-fv6c
Nodemailer 3.0.0 before 10.4.1 contains an address parsing flaw in addressparser that truncates...
Nodemailer 3.0.0 before 10.4.1 contains an address parsing flaw in addressparser that truncates domains at folding whitespace or comments before a dot, allowing attackers to bypass recipient domain restrictions. Attackers can submit crafted to, cc, bcc or replyTo addresses that pass RFC 5322 domain checks but deliver mail to an attacker-chosen address under the application's sender identity.
- Record
GHSA-j5rx-43mx-fv6c- 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-436
- Updated
- 2026-11-10
NVD
Nodemailer 3.0.0 before 10.4.1 contains an address parsing flaw in addressparser that truncates domains at folding whitespace or comments before a dot, allowing attackers to bypass recipient domain restrictions. Attackers can submit crafted to, cc, bcc or replyTo addresses that pass RFC 5322 domain checks but deliver mail to an attacker-chosen address under the application's sender identity.
- Record
CVE-2026-125755- 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-436
- Updated
- 2026-11-10
OSV
Nodemailer 3.0.0 before 10.4.1 Recipient Allow-List Bypass via addressparser
Nodemailer 3.0.0 before 10.4.1 contains an address parsing flaw in addressparser that truncates domains at folding whitespace or comments before a dot, allowing attackers to bypass recipient domain restrictions. Attackers can submit crafted to, cc, bcc or replyTo addresses that pass RFC 5322 domain checks but deliver mail to an attacker-chosen address under the application's sender identity.
- Record
CVE-2026-125755- 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-436
- Updated
- 2026-11-12
OSVCLSA-2026-1794329057 No score
TuxCare security update for nodemailer (1 CVE)
TuxCare rebuilt nodemailer to address 1 CVE. Fixed in 9.1.0-tuxcare.9.
- Record
CLSA-2026-1794329057- Updated
- 2026-11-10
Show 5 moreShow less
OSVCLSA-2026-1794334703 No score
TuxCare security update for nodemailer (1 CVE)
TuxCare rebuilt nodemailer to address 1 CVE. Fixed in 9.0.6-tuxcare.9.
- Record
CLSA-2026-1794334703- Updated
- 2026-11-11
OSVCLSA-2026-1794338601 No score
TuxCare security update for nodemailer (2 CVEs)
TuxCare rebuilt nodemailer to address 2 CVEs. Fixed in 9.0.5-tuxcare.10.
- Record
CLSA-2026-1794338601- Updated
- 2026-11-11
OSVCLSA-2026-1794352735 No score
TuxCare security update for nodemailer (2 CVEs)
TuxCare rebuilt nodemailer to address 2 CVEs. Fixed in 9.0.3-tuxcare.9.
- Record
CLSA-2026-1794352735- Updated
- 2026-11-11
OSVCLSA-2026-1794389879 No score
TuxCare security update for nodemailer (2 CVEs)
TuxCare rebuilt nodemailer to address 2 CVEs. Fixed in 9.0.2-tuxcare.10.
- Record
CLSA-2026-1794389879- Updated
- 2026-11-11
OSVCLSA-2026-1794399029 No score
TuxCare security update for nodemailer (2 CVEs)
TuxCare rebuilt nodemailer to address 2 CVEs. Fixed in 9.0.1-tuxcare.8.
- Record
CLSA-2026-1794399029- Updated
- 2026-11-11
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
nodemailerTuxCare:npm |
9.1.0-tuxcare.0 up to 9.1.0-tuxcare.9, plus listed versions 9.1.09.1.0-tuxcare.19.1.0-tuxcare.29.1.0-tuxcare.39.1.0-tuxcare.4 Show 4 moreShow less9.1.0-tuxcare.59.1.0-tuxcare.69.1.0-tuxcare.79.1.0-tuxcare.8 |
9.1.0-tuxcare.9 |
nodemailerTuxCare:npm |
9.0.6-tuxcare.0 up to 9.0.6-tuxcare.9, plus listed versions 9.0.69.0.6-tuxcare.19.0.6-tuxcare.29.0.6-tuxcare.39.0.6-tuxcare.4 Show 4 moreShow less9.0.6-tuxcare.59.0.6-tuxcare.69.0.6-tuxcare.79.0.6-tuxcare.8 |
9.0.6-tuxcare.9 |
nodemailerTuxCare:npm From an advisory covering 2 CVEs |
9.0.5-tuxcare.0 up to 9.0.5-tuxcare.10, plus listed versions 9.0.59.0.5-tuxcare.19.0.5-tuxcare.29.0.5-tuxcare.39.0.5-tuxcare.4 Show 5 moreShow less9.0.5-tuxcare.59.0.5-tuxcare.69.0.5-tuxcare.79.0.5-tuxcare.89.0.5-tuxcare.9 |
9.0.5-tuxcare.10 |
nodemailerTuxCare:npm From an advisory covering 2 CVEs |
9.0.3-tuxcare.0 up to 9.0.3-tuxcare.9, plus listed versions 9.0.39.0.3-tuxcare.19.0.3-tuxcare.29.0.3-tuxcare.39.0.3-tuxcare.4 Show 4 moreShow less9.0.3-tuxcare.59.0.3-tuxcare.69.0.3-tuxcare.79.0.3-tuxcare.8 |
9.0.3-tuxcare.9 |
nodemailerTuxCare:npm From an advisory covering 2 CVEs |
9.0.2-tuxcare.0 up to 9.0.2-tuxcare.10, plus listed versions 9.0.29.0.2-tuxcare.19.0.2-tuxcare.29.0.2-tuxcare.39.0.2-tuxcare.4 Show 5 moreShow less9.0.2-tuxcare.59.0.2-tuxcare.69.0.2-tuxcare.79.0.2-tuxcare.89.0.2-tuxcare.9 |
9.0.2-tuxcare.10 |
nodemailerTuxCare:npm From an advisory covering 2 CVEs |
9.0.1-tuxcare.0 up to 9.0.1-tuxcare.8, plus listed versions 9.0.19.0.1-tuxcare.19.0.1-tuxcare.29.0.1-tuxcare.39.0.1-tuxcare.49.0.1-tuxcare.59.0.1-tuxcare.69.0.1-tuxcare.7 |
9.0.1-tuxcare.8 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, aliases | OSV | |
| affected | OSV | |
| affected, aliases | OSV | |
| aliases, references | OSV | |
| affected, aliases | OSV | |
| published | EUVD | |
| affected, aliases, facts | OSV | |
| published | EUVD | |
| aliases, references | GitHub Advisories, NVD | |
| cwes, references, severity, title | CVE List | |
| first indexed | EUVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-125755 is a high vulnerability (CVSS 8.3) in Nodemailer, published November 10, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.26%, the 17th percentile. Fixed in nodemailer 9.1.0-tuxcare.9.
References
github.com/nodemailer/nodemailer/security/advisories/GHSA-3q53-mvfw-q9v8
vulncheck.com/advisories/nodemailer-3.0.0-before-10.4.1-recipient-allow-list-bypass-via-addressparser
nvd.nist.gov/vuln/detail/CVE-2026-125755